Do it again and post that error massage here, so we can have a look at it (if its long do a screenshot).
Check the ini file if the tool has recognized SH4 install dir at all, like for example:
GamePath=D:\Ubisoft\Silent Hunter 4 Wolves of the Pacific -(that is mine);
if there is such info, then its really may be some privileges issues; if not you can put it there yourself and see what happens - but thats desperate