Well, I sort of have things working again. I stripped all Lazarus Files and Directories from my computer including C:\Users\Avishai\AppData\Local\Temp\
Then I installed fresh from SourceForge. That got things running again. By the way, it placed FPC inside the Lazarus Directory. Anyway it's running. Sort of.
I changed the paths for FPC to C:\FPC which I kept from before and had no problem. But I renamed C:\Lazarus\FPC to C:\Lazarus\xxxFPC to be sure that it was actually using C:\FPC. And I started getting errors. So I renamed it back to C:\Lazarus\FPC and it works again, even though the paths are set to C:\FPC
Now what I need is to update to the latest Lazarus but I would like some advice on the best approach to do this. Since C:\Lazarus is no longer an SVN, is it safe to simply do an SVN Checkout on C:\Lazarus, or how do I go about this safely?