Can't open any repo, "git status failed with code -1"

Just installed 1.8.2. Previously installed version (1.6?) worked fine. Can no longer open any repo bookmarks. I dropped and re-added the bookmarks, but continue to get the same problem. See attached. Note that when I run git status from the command line, I get a correct response, showing me the status of the repo. Also attached. Additionally, other git gui tools seem to work just fine on this repo. I have 4 repos that I use on a regular basis, and ST cannot seem to open any of them, though the earlier version did just fine.

SourceTree is now completely unusable for me in any way.