If you encounter the following error message :
Please try signing out via the Help Menu first as follows :
1. [menu] Help > Signout (emailaddress)
2. PC: [menu] File > Exit SketchUp
Mac : [menu] SketchUp > Quit SketchUp
If the issue still cannot be resolved after signing out, please the refer to the following steps:
For Windows
1) Close all instances of SketchUp and LayOut. To make sure they do not continue running in the background, please go to your Taskbar and right click on any SketchUp or LayOut icons and select Close Window.
2) In Windows File Explorer, go to Windows (C:) > Users > your user name > AppData > Roaming > SketchUp [year] (C:\Users\username\AppData\Roaming\SketchUp\SketchUp[year])
Note: If you can't find the AppData folder, please open with Windows key + R (on your keyboard) and type %appdata%
3) Locate and delete the "login_session.dat" file
4) Restart SketchUp and login
For Mac
1) Close all instances of SketchUp and LayOut. To make sure they do not continue running in the background, please go to your Taskbar and right click on any SketchUp or LayOut icons and select Close Window.
2) Go to Finder, then click on 'Go' on the menu bar, then hold the 'Option' key.
3) 'Library' should appear in the list. Click 'Library'.
4) Navigate to Application Support > SketchUp (year) e.g. SketchUp 2026
Note: You can also do the same using 'Apple+G' and paste in: ~/Library/Application Support/, then navigate to your current SketchUp folder e.g. SketchUp( year)
4) Locate and delete the "login_session.dat" file
5) Restart SketchUp and login