The uninstall process may have already removed those files for you, to clarify there would be one in ProgramData
ProgramData\Epic\EpicGamesLauncher\
and one in Users
Users*YOURNAME*\AppData\Local\EpicGamesLauncher\
it’s just to delete these if the Launcher hasn’t cleaned up all the files for you.
When you reinstall the Launcher, please let us know how you get on, thanks.
Andrew