I can't log in in version 3.7
It claims that my username and password are wrong
But they are not!

No caps ?
Your keyboard is well configured ?

My board is in perfect shape

Open the tb_login.dat file in your Toribash folder and check out if your pass & user name are good (ignore the square stuffs between each characters)

I can't see any tb_login.dat
EDIT: there is one in 3.65 folder
not in 3.7
EDIT2: there are no square things between letters

Just copy the tb_login.dat from the 3.69 folder to the 3.7 folder, that should do the trick.

If not, i suggest reinstalling the game.