How to remove all remnants of the script?

[ka-iden]

Before I ran the script, there was no notice at the top saying "Some of these settings are managed by your organisation."
But when I unenroll using the "Stop receiving Windows Insider builds" option, the Windows Insider Programme section under Windows update is empty, but the notice remains (see image below)

This is usually because of some leftover registry key, how do I remove all of those mentioned? basically returning it to how it looked before the script was ran?
I'm running Windows 11 25H2 (26200.7462) if that helps at all.

[abbodi1406]

Everything added by the script is removed with option 4
did you reboot?

unless some registry keys were locked in-use when you unrolled
make sure Settings app is closed, and run the option again

[ka-iden]

Yes I did reboot, and the settings app wasn't open when running the script prior to rebooting, how would I check for those locked registry keys? I tried copying and running each of the registry key removal lines from the batch file, but this still appears.

[abbodi1406]

run regedit.exe and go this key path, and right-click on the key name and choose "Export", then attach the .reg key
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsSelfHost