unpacked
started GitGUIPortable.exe
created empty repository on github
clicked clone, cloned my freshly created empty repository to disk
unstaged changes lists some random garbage files, all with .tmp extension. Clicking rescan generates new group of random garbage tmp files.

clicking on one of them generates popup "error loading file, could not read xx.tmp, no such file or dir"

*First time using git gui. No idea what Im doing.