It actually won't hurt to leave the thumbnails in the file and install it and use it. They are false positives. But if you want to remove them that is possible too. Uncheck the files and then do File… (View Post)
I forgot to add, for the sims3packs that you find are corrupted, if any, you'll have to uninstall those sims from the Launcher Installed tab. (View Post)
Ok, first put your The Sims 3 folder back. Delete The Sims 3 folder in (My) Documents\Electronic Arts\ Move The Sims Folder from your desktop to (My) Documents\Electronic Arts\ Let's check your mods … (View Post)