OK, I think I figured it out. Instead of clicking "Run" I clicked cancel, and another popup opens with all kinds of warnings and a box to check stating you accept the risk. I checked the box, then clicked Run. Desktop opens empty as before, but I clicked the tiny file/document icon in the top left corner, and all my computer files dropped down. Then clicked on the file I wanted and was able to select and upload files. Still seems a little buggy...doesn't automatically open manage images page after uploading like it used to, and portions of the page seem to disappear. Hopefully Auctiva will work out the bugs soon.