Microsoft is crappy, and updating windows 10 versions can break ClickOnce, which is what the installer version of GamParse uses.
Uninstalling and reinstalling GamParse *should* work, but I haven't tested it on Spring Creators yet since it is brand new and I usually wait a few weeks before I update in case Microsoft breaks something important.
If uninstall/reinstalling doesn't work, you should be able to use the standalone .exe until I can find the problem.