The SystemsNames.txt file would crash the game if it had over 16,380 names in it.
Niice. I think that one was first reported at what, 7 PM last night?
EDIT: on the other hand, its saying my copy does not match the older version needed. hmm.
EDIT2: it was because I had moved the SE5 folder. Also, the installer really doesn't like it if any of the SE5 files are marked read-only.