Designer loses connection


I got this error continuously from designer. When I want to see the scripting, or when I save my project, the designer loses connection with gateway but the clients works well.


Also I got this:

And this:

Do you think that I need do an upgrade?!

There is another thread on here about same thing also. I am on 7.7.4 and I see it on occasion here also.

Ok, thank you.