UBB.threads PHP Forum Software Community Forums News and Releases Pre-Sales Questions updating from old version to latest version of ubb

My config.inc.php tells me - $VERSION = "6.2";

So i must download 6.5.5 - overwrite the whole folder. Run server.com/ubbthreads/install/ and choose upgrade?

But for some reason it shows me blank page. no errors, nothing. Just blank. Perhaps starting over with 6.2 would help? But where to find 6.2 blank install?