after updating winvice to version 2.4 (win7, 32bit), the zip support seems to be broken.
i managed to get around this problem by placing unzip.exe - which is said to be not needed anymore - in the same folder.
but the next big issue is gamebase. no matter what i tried, it comes up either with '7-zip failed to unpack archive', or, after adding 'zip' to the native filetypes, with 'this game type is not supported by this emulator'!
please help, so i can enjoy awesome gb64 again.