Thanks, so if I wanted to just modify it, could I run it from SCCM again as I do now to install it and do something like
PasswordStateCredentialProvider.exe REMOVE=FALSE MODIFY=TRUE /S Text="Update my account" URL="https://aka.ms/sspr"
I've tested the command and it works as I want it to, so I think this should be an alternative to an uninstall. I've also figured out that if you run the exe on its own with no options, it uninstalls itself, which is a bit weird.