I had a slic3r job that froze, so i did a force quit, did a repair via netfabb online services. Tried again and it froze again in the slic3r process, so I did a force quit. Now when i open repetier sort of works, except I can not add an stl, by clicking add stl. I cannot select the slic3r tab / slic3r settings. If i open directly a .stl file it will show up in the display area, but not on the right side. After a bit the file will just disappear. I have deleted the application and /Users/yourlogin/Library/Preferences/repetier plist and slic3r files. downloaded a fresh copy an no go. any ideas..