If you update your browser, you might want to rollback the update or to undo it.
Mostly used in database management, I often hear/read about rollback of driver updates or program installs.

Answer from mplungjan on Stack Exchange
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Power Thesaurus
powerthesaurus.org › not_updated › synonyms
NOT UPDATED Synonyms: 329 Similar Words & Phrases
AboutPRO MembershipExamples of SynonymsTermsPrivacy & Cookie Policy · Lists · Parts of speech · Tags · not upgraded · outdated · adj.#outdated · archaic · adj.#outdated · out-of-date · adj. ancient · adj.#outdated · antediluvian · adj.#outdated ·
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Power Thesaurus
powerthesaurus.org › not_updated
NOT UPDATED in Thesaurus: All Synonyms & Antonyms
Browse the complete thesaurus entry for Not updated, including synonyms and antonyms, and related words.
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Thesaurus.com
thesaurus.com › browse › not-current
NOT CURRENT Synonyms & Antonyms - 68 words | Thesaurus.com
antiquated behind the times bygone dead demoded disapproved dowdy démodé extinct grown old moldy musty neglected not modern not with it obsolescent obsolete of old of olden days of the old school old guard old-hat old-school olden oldfangled out out of it out of style out-of-date outworn ...
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Cambridge Dictionary
dictionary.cambridge.org › thesaurus › outdated
OUTDATED - 28 Synonyms and Antonyms - Cambridge English
Things that are old-fashioned are not modern or are typical of the past. Cambridge English Thesaurus © Cambridge University Press ... These are words and phrases related to outdated. Click on any word or phrase to go to its thesaurus page. Or, go to the definition of outdated. His language was outdated. ... Synonyms for outdated from Random House Roget's College Thesaurus, Revised and Updated Edition © 2000 Random House, Inc.
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Thesaurus.com
thesaurus.com › browse › outdated-out-of-date
OUTDATED/OUT-OF-DATE Synonyms & Antonyms - 30 words | Thesaurus.com
anachronous antiquated antique archaic back number behind the times dated dusty démodé has-been moth-eaten musty not with it obsolete old old-hat out out of style outmoded passé square tired unfashionable vintage
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Merriam-Webster
merriam-webster.com › thesaurus › outdated
OUTDATED Synonyms: 100 Similar and Opposite Words | Merriam-Webster Thesaurus
Synonyms for OUTDATED: obsolete, archaic, antiquated, medieval, out-of-date, rusty, outmoded, old; Antonyms of OUTDATED: modern, new, current, contemporary, recent, up-to-date, present-day, fresh
Top answer
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Unsupported

Is the term usually applied to this type of software. Unsupported in the software world, usually means 'end of life', and 'no more updates'.

End of life and unsupported are synonymous in this context.

For example, from:

Microsoft

What does it mean if Windows isn't supported? An unsupported version of Windows will no longer receive software updates from Windows Update. These updates include security updates that can help protect your PC from harmful viruses, spyware, and other malicious software which can steal your personal information. Windows Update also installs the latest software updates to improve the reliability of Windows—such as new drivers for your hardware.

Will I still be able to use Windows after support ends?

Yes, even if you have an unsupported version of Windows XP or Windows Vista, Windows will continue to start and run. You just won't be able to receive software updates from Windows Update any longer.

Berkley Information Security Policy

Security best practices...require the use of supported software for which the vendor will make security updates available in a timely fashion. As vendors are unable to support all previous versions of software, older programs are dropped from support and must be upgraded or removed from the network.

Australian Government (stay smart online)

Stop using unsupported software and apply new security updates

You should retire all vendor products that have reached end of life, meaning they are no longer supported. These products typically do not receive any patches that protect against newer viruses, spyware or other malicious software and may not be subject to technical support.

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legacy software

And I am most definitely not a programmer.

For example: legacy software

What is legacy software?

Legacy software is software that has been around a long time and still fulfills a business need. It is mission critical and tied to a particular version of an operating system or hardware model (vendor lock-in) that has gone end-of-life. Generally the lifespan of the hardware is shorter than that of the software. As time goes on, the hardware gets harder to maintain but is kept because it is installed and (for now) working and has proven too complex and/or expensive to replace.

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WordHippo
wordhippo.com › what-is › another-word-for › outdated.html
What is another word for outdated? | Outdated Synonyms - WordHippo Thesaurus
Synonyms for outdated include outmoded, antiquated, archaic, dated, obsolete, superannuated, outworn, prehistoric, medieval and old. Find more similar words at wordhippo.com!
Find elsewhere
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Power Thesaurus
powerthesaurus.org › not_update › synonyms
NOT UPDATE Synonyms: 72 Similar Phrases
not upgraded · unable to update · you cannot update · Log in to access more content! Upgrade to PRO for exclusive synonyms, antonyms, and advanced resources. Elevate your writing today! Explore PROLog in ·
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UsingEnglish.com
usingenglish.com › forums › learning english › ask a teacher › popular topics
The opposite of ''updated'' | UsingEnglish.com ESL Forum
January 8, 2012 - Just because a website hasn't been updated for a while doesn't necessarily mean that it's out of date. Perhaps all the information on it is still valid. However, if you know that there are updates that should have been made, then "not up-to-date" or "out of date" would be appropriate.
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Quora
quora.com › What-are-some-synonyms-for-outdated-or-out-of-date-Why-might-it-be-better-to-use-these-words-instead-of-the-original-terms
What are some synonyms for 'outdated' or 'out-of-date'? Why might it be better to use these words instead of the original terms? - Quora
Answer: Old-fashioned, outmoded, out of fashion, unfashionable, out of style, dated, outworn, old, former, obsolete, bygone, defunct, antediluvian, anachronistic, old-fangled, moth eaten, archaic, superannuated, quaint.
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Thesaurus.com
thesaurus.com › browse › outdated
OUTDATED Synonyms & Antonyms - 41 words | Thesaurus.com
Find 41 different ways to say OUTDATED, along with antonyms, related words, and example sentences at Thesaurus.com.
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Power Thesaurus
powerthesaurus.org › no_update › synonyms
NO UPDATE Synonyms: 46 Similar Words & Phrases
AboutPRO MembershipExamples of SynonymsTermsPrivacy & Cookie Policy · Lists · not updated · no refresh · top of page · any update · there is no update · no news · no word · any news · not news · nothing new · not a new · no new ...
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Thesaurus.com
thesaurus.com › browse › out-of-date
OUT-OF-DATE Synonyms & Antonyms - 51 words | Thesaurus.com
Find 51 different ways to say OUT-OF-DATE, along with antonyms, related words, and example sentences at Thesaurus.com.
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Quora
quora.com › What-do-you-call-someone-who-is-not-up-to-date-with-the-latest-colloquialism-and-expressions
What do you call someone who is not up to date with the latest colloquialism and expressions? - Quora
Answer: I would refer to them as people who are more intelligent than those who follow popular fashions. Colloquialisms have little utility, except for that segment of the population who do not comprehend objective communication and meaningful communication. This has been demonstrated repeatedl...
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Quora
quora.com › What-is-the-alternative-to-word-Updation
What is the alternative to word 'Updation'? - Quora
Answer (1 of 2): I think, the alternative word of “updation” is modification. In IT sector, this word is mostly used Updation simply means the modification of software with new features and functions. This operation is only done on older version of the same software.
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Power Thesaurus
powerthesaurus.org › not_up_to_date › synonyms
NOT UP TO DATE Synonyms: 78 Similar Words & Phrases
AboutPRO MembershipExamples of SynonymsTermsPrivacy & Cookie Policy · Lists · Parts of speech · behind the curve · not current · not up-to-date · not be up-to-date · not uptodate · no longer up-to-date · no longer current · be up-to-date ...
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WordHippo
wordhippo.com › what-is › the-opposite-of › updated.html
What is the opposite of updated?
Antonyms for updated include unchanged, unqualified, continued, held, kept, maintained, preserved, retained, sustained and dated. Find more opposite words at wordhippo.com!