I emailed you a test copy of Hoster 3.109 Beta 1 release to try.
I can't explain why your files disappeared with the drive being renumbered. I'm not sure you can renumber in Windows. I think you should remove the "thumb drive", reattach the USB HDD with your songs, then plug in your "thumb drive" again. That should give the USB drive F, and the Thumb drive G.
Post here your results with 3.109 beta 1.
