Well, there are two possibilities. One is simple, the other not so simple. First, there's a file named FixTK.py that seems to be necessary as a sort of key to the TK system. (That's the Windows- style GUI for Python.) FixTK should be at: Runtime/Python/Lib/Lib-TK/FixTK.py If you can't locate -any- of that path, especially the entire Python/Lib folder, then your installation is seriously messed up. The indication that MainButtons.py can't be found, tends toward the more serious problem. Can you find FixTK.PY in that folder? Is the LIB folder full of other PY and PYC files? If so, you're not too badly off....

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