I wont be updating V3.X.
There is no point in me building a huge new plugin/component and then going back over to repair an old one. If you have any problems, please update your version to 5.X and try again. If you still have problems, then I will try to find the fault and release the repaired version so other people wont have the same problems.
Versions 1.0 - 4.3 was for Joomla 1.0 and VirtueMart 1.0
Versions 4.4 - current is for Joomla 1.5 and VirtueMart 1.1
It doesn't work with cross platform such as Joomla 1.0 and Virtuemart 1.1.
But if you have any other enquires, please ask away and i will do my best to help

Regards
Ian