This is incorrect. I tried this and I get zero option to choose edition. My story:

Had Windows 10 (physical key) -> Upgraded to Windows 11 Home -> Then paid for a 11 Pro Upgrade. I upgraded my hardware and did a fresh install.

I thought it would auto detect the version of the key. It did not. I tried multiple times, agonizingly multiple times to get this to upgrade to 11 Pro like I had paid for, even going to my order history on my MS Account (all this gave me was an invoice - no keys no nothing).

Got in contact with MS Support only to tell me to download the ISO for Mult-version. He have me a whole lot of instructions, but nothing I wouldn't have known in the first place. Ran setup, went through all the rigmarole and options for keeping apps and files, and what does it tell me?

"To re cap you have chosen to:

• Install Windows 11 Home

-Keep personal files and Apps?

I made no such choice. No boxes, no ticking, no nothing. There is literally no option for choosing your version.

Where can I get an ISO of this release? The laptop comes with 24H2 and certain software refuses to work. . .
Any ideas?

When you boot from the Windows 11 installation media, the install.wim in the sources folder is loaded into memory to create drive X:. The setup.exe file on this drive X: is executed when the UI is used to install Windows. This setup.exe reads the registry hacks you made to enable you to do a clean install of Windows 11. You are now trying to upgrade to Windows 11 25H2 without losing your data. In such cases, you do not boot from the installation media. The normal procedure would be to run the setup.exe file in the root directory of the installation media while booted to your existing Windows 11. This setup.exe is not the same as the one stored in install.wim and will ignore such registry hacks.

I have yet to test the procedure given below on my 2018 Mac mini. However, the procedure should be the same as on other Windows machines. The procedure upgrades Windows 11 to 25H2 instead of doing a clean install.

Use Rufus to create the installer from the Windows 11 25H2 ISO. (I use the portable type.) Rufus replaces the setup.exe that comes on the ISO with its own version. From Windows 11, run setup.exe on the drive created by Rufus to upgrade to Windows 11 25H2.

In the past, instead of using a USB flash drive, I used a mounted VHD file that was created using the Windows Disk Management application. However, if internal drive space is limited, then try using a flash drive. (My Mac mini only has a 250 GB internal drive that is shared with macOS.)

Note this answer is similar to one of my previous answers. The major difference is that your Mac UEFI boots Windows.

Update

I decided to test both Rufus and FlyOOBE (formally FlyBy11) for upgrading Windows 11 22H2 to Windows 11 25H2. I did this by first creating a Windows 11 Pro 22H2 (with all available updates installed) VMware Fusion Player (version 12.1.2) virtual machine. Windows was installed to UEFI boot without secure boot or a TPM. The host is a 2013 iMac (iMac14,3) with macOS Catalina (version 10.16.7) installed. The processor is an Intel i5-4570S.

Using Rufus

The steps are given below.

1. Download Win11_25H2_English_x64.iso from this Microsoft website.
2. Download rufus-4.11p.exe from the Rufus website.
3. Use the Windows Disk Management application to create a mounted 8 GB VHD file.
4. Use Rufus (after it updates itself) to select the ISO file, then write to the mounted VHD file. The default Rufus settings were used.
5. Run setup.exe in the root folder on the mounted VHD file and upgrade to Windows 25H2.

Using FlyOOBE

The steps are given below.

1. Download Win11_25H2_English_x64.iso from this Microsoft website.

2. Download FlyOOBE 2.1 (FlyoobeApp.zip) from this GitHub website.

3. Use the Windows File Explorer to "Extract All..." from the FlyoobeApp.zip file.

4. Open the FlyOOBE application. If you get the following pop-up, select "More info"

   

   The pop-up will now appear as shown below. Select "Run anyway".

   

5. When the window shown below appears, select "Details" under "Upgrade to Windows 11".

   

   When the window shown below appears, select "Run".

   

   If the following pop-up appears, select "Run".

   

   When the window shown below appears, drag and drop the ISO file into the box labeled "Drag & drop ISO here or click to import from local file".

   

   If the following pop-up appears, select "Yes".

   

   You can ignore the following pop-up.

   

6. Upgrade to Windows 25H2. When the following window appears, select "Next", then proceed with the upgrade. Note: In my case, I am upgrading Windows 11 Pro even though the window below states "Install Windows Server".