Is it possible to allocate more RAM to Materials Studio?

I am using Forcite geometry optimization module to calculate structures of huge supermolecules, but as the molecule gets larger, the time it takes to optimizes gets longer. Now one calculation takes about a whole day to process. I opened task manager, only to discover than only around 1 out of 16 GB of RAM is used during the process. Is there any way to speed up the calculations by allocating more ram to Materials Studio? Any help is appreciated, thanks!