In Summary you are informed if new version of ST is released.

Possible errors messages:
  Can't connect ST server - script was unable to connect www.thumbsrotator.com
  Error (error number) - (error description) - script cannot download information if new version is released - could be problems as "file not found, forbidden .."
  Can't save version file into update directory, allow writing into update dir - check if st/admin/update directory has chmod 777 (it is problem with user rights - web user cannot save files into update directory)

Update will inform you about new features in new version. Update allows you to update every time last ST version.

Click Download files! download new files into your server.

Link START ST UPDATE starts update process. Be aware that before update script create backup of your current mysql database and files. Errors during upgrade will start rollback process and your old mysql database & files will be restored.

After update do immediately:
  save settings
  perform manual rotation