Hi Marc.
actually im using version 3.626 64 bit
I assume you mean Podium 3.2.6. There is a newer 3.2.7 release which is worth checking out. I made changes to the plugin handling, mainly for the loading of plugins, but other optimizations could have improved plugin stability.
To figure out which plugin is causing the problem, try starting a new project and gradually add plugins to your arrangement until you find the plugin that causes the freezing.
Edit: Another approach could be to take the arrangement that is causing you trouble, bounce all the plugin tracks to make the plugins inactive, and then gradually unbounce the tracks until you find the plugin track that causes the freezing.