If you mean deleting saves, they are here
C:\Users\*username*\Documents\SavedGames\RingRunner
*username* = your user that you installed the game for, administrator also option.

And run un-instal?

I mean about local files rather than savegames, like you know, sometimes you uninstall something but some files are left in the hard disk.

I think the game only creates 2 folders, the base instal folder, and the save directory.

Though I'm not 100% sure, I guess we could figure out what the .exe installer creates :/

I'm unsure if game settings is saved into the save directory, or if it has its own folder, no clue there.

In my machine they're in C:\Users\*username*\AppData\Local\Apps\2.0\
I think its ok if when you delete them and updated files will be pulled from server as needed.