I too am facing this issue for an Install Shield 2020 license which has been released on an old colleague's machine (via "Help → About → Return License") but is failing to be usable on their replacement's machine running Install Shield 2021. Any adv...
This time deleting this registry key deleted the Add/Remove Program Files entry. I don't think there are any more left to delete after this one though:Computer\HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\Instal...
Strangely this time, the entry went to what appears-to-be the 32-bit equivalent registry path:Computer\HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\PRODUCT_CODE_GOES_HEREDeleting this one yielded the same result.
Having corrupted the installation again in the same way, the registry key has not reappeared and thus I cannot delete it to resolve the issue again! The entry still appears under Add/Remove Programs however (I say "however" because I thought that lis...
