errors after upgrade

[nasnas]

i've upgraded ibProArcade from version 2.5.5 to 2.6.8 for vBulletin 3.8.3.

I get an error at the top of my forum, no matter what template i use:

Warning: Missing argument 20 for skin_Arcade::start(), called in [path]/arcade.php on line 1876 and defined in [path]/arcade/skins/skin_Arcade.php on line 220

At the botum of my forum there's still the old version number

ibProArcade v2.5.5+
Erweiterte vBulletin-Version von MrZeropage
deutsche ?bersetzung von MrZeropage
Original ? Chris Kelly 2004

And the 3rd problem is that when i used the old version, people can see at the left side of an user his highscore, now this is gone, also the users avatars in the playhall.

What went wrong with the upgrade?

[nasnas]

i think i do a fresh install to get the errors away.

One question: after removing this mod, are the tables with the game stats also removed?

In that case, can i make a dumb from the games_ tables, do a fresh instal, import the dumb and then everything is ok whith the data??