I just worked out how to fix it so it doesn't crash after renaming, and it's so blindingly obvious that I'm kicking myself for not spotting it! 
Open up Goodinfo.cfg that should have came with the GoodTool (eg. GoodN64) with notepad. Edit the following from:
to:
Hope I'm not the only one on the board yet to discover this! Who needs a new version of GoodWindows, eh?
Open up Goodinfo.cfg that should have came with the GoodTool (eg. GoodN64) with notepad. Edit the following from:
Code:
#change to OldFormat=y for GoodWindows compatibility
OldFormat=n
to:
Code:
#change to OldFormat=y for GoodWindows compatibility
OldFormat=y
Hope I'm not the only one on the board yet to discover this! Who needs a new version of GoodWindows, eh?