Ever time you start 'Guru" it will try to 'log in' to Steam even if you are off line and the icon will appear , so if you don't want the slow down problem you have to exit Steam again thru the icon . I tried it several times now and for sure it fixes the 'problem' until there is a 'fix' . You can exit Steam even if you are in the editor , just ignore being asked to shut down the editor . It will just load what you were doing last time you were working on , even if you didn't save it .
From outdated DOC files to no DOC's at all , not good for new 'Guru' owners and some of us that have been here for a while .....
As you can see I an so busy today
Lance