I'd strongly recommend a clean install. Applying the patch to a week-old install of Carrara5 that already had the 5.0.5 patch on it made for an application that locked up badly within a few moments of entering the VM. A clean install and immediate application of the 5.1 patch restored to normal function. Thank you so much for getting the UV map fix in there. I am very happy with this fix, and I'm modeling away like crazy right now. (I can work around the group names bug for now...)