Update to FF4/5 Rated 5 out of 5 stars

Quote from an e-mail I received from Paul Spangler:
"this has been a busy time for me. I do want to get it updated, but I don't know when I'll be able to get to it."

Rated 5 out of 5 stars

I like this add-on very much.
Just one question: I use PowerDesk as default "Explorer". Would it be possible to open the containing folder of an add-on with my (or better any) default-explorer in stead of the Windows-Explorer?