I got interrupted and made a mistake when I got back to the computer. I intended to uninstall an addon and then delete the folder from the server. The mistake was that I forgot I hadn't done the uninstall but still removed the folder. The addon is TMS 1.3.0 by Guiltar. The TMS folder was located in myforum/library. Trying to uninstall results in an error (files necessary for uninstallation could not be found, please replace them). I took the original folder from the unzippped 1.3.0 addon and put it on the server. Same error occurs on uninstall. When I try to disable the addon, I get "callback TMS_Install::build is invalid" and "callback TMS_Install::destroy is invalid". Next I tried to do an upgrade. I put the TMS 1.3.1 folder into myforum/library and it overwrote the TMS 1.3.0 files as expected. When I ran the xml file, I got the error that "files associated with this upgrade could not be found". Is there a way to remove the TMS addon so it no longer exists on the XF installation?