I'm having an issue with the most recent toad update (22.214.171.1249 (64 bit)). When I choose Quick Export --> Excel Instance --> Excel instance at active cell, a giant processing window pops up. Once it completes, the "multiple excel instances available" window pops up, but it's distorted and doesn't show all of the text. I switched back to the previous version on more than one computer and the problem resolved itself. It's only an issue in the newest update. I've attached screenshots.
what OS are you on? What are your display settings? Have you tried switching to some default theme in Toad?