Force quitting is never a good idea unless you absolutley positively have no other choice (like the only way to preserve a doc that ID won't save). Print presets, if you don't save them to an external file, are stored only inside the InDesign Defaults file, so if they disappeared, the prefs were re-written.
I don't see much point in reinstalling until you figure out what is causing the problem. It's probably a conflict with something else.