Well, the Explorer Extension (ashQuick) sometimes has problems with skins. I can't say why it is so... seems to be some kind of conflict between the skinning OCX and the ATL library used in this module. It usually works... with a few exceptions (like you). I really don't know what to do about it.
In the program settings, you can turn off the skins for the Explorer Extension. It won't look so nice, but the crashes will be gone...