Please download the latest version [v2.6.1] of the SketchUcation PluginStore RBZ from here: http://sketchucation.com/pluginstore?pln=SketchUcationTools Then use the Preferences > Extensions > Install... button as explained before... and restart SketchUp to ensure the changes are set up properly... Any luck with it now ? The PluginStore dialog being blank is probably result of some Internet Explorer interaction or settings... SketchUp's web-dialogs always use IE on PCs - even if you prefer another browser for normal web-use... You should update IE to the latest version - because if you have say IE8 or 9 it can cause issues. IE11 is the current / best version. In 'About IE' also tick 'update automatically...' It might also be a 'cache' issue. In IE clear its cache - Ctrl+Shift+Delete - or via the Safety menu item. Then reopen the PluginStore dialog - you might have a corrupted cache, so it could now work. Also can you open the Ruby Console and type in this + <enter> SCF::TEMPDIR What do you get as the result ? Any results ??