Update not working...

Today I downloaded the gmod update, tried to join a server and this message appears “The server you are trying to connect to is running a newer version of the game” i’ve tried various methods to try and fix this issue, re-download gmod, restart steam and restart pc but nothing has worked some pls help.

Try switching to “Dev” beta branch, launch the game, and then switch back to NONE.

uhh how?
soz im noob :S

Should I keep my gmod on dev mode? because when I switch back to none it just gets that message again.

[editline]11th August 2015[/editline]

When I turn dev mode on it only works on some server but if I turn it to none then it doesn’t work on any servers.

[editline]11th August 2015[/editline]

nvm It works ty