Hey Boki,
First I replaced them with WinRar and second try I used Total Commander.
Same result.
App starts with the small " loading Israel (nl) " for a few seconds and than black screen for as long I wait, more than 10 min.
Renamed back the original avicsync_nextgen.zip ( I only renamed it before ) and it launches as new again without problems.

So, I did something wrong.