For everyone that’s experiencing “Internal error: DownloadTemporaryFile: Invalid Url value.” the problem, I believe, is with the SharewareOnSale website incorrectly giving a link that doesn’t exist.
You can download version 8.0 of SoftOrbits Photo Background Remover directly from the SoftOrbits website, which is: www <dot>softorbits <net>. (Click on the ‘hamburger menu’ … the three vertically stacked lines at the top right of the screen, then left-click on Our products.) Scroll down to near the bottom of the page to find Photo Background Remover.
Today’s license key DOES work with it.