I’m also having screen size issues, but with EZDrummer 2 32 bit. Under Win 7 on a netbook the screen size cuts off the lower portion of the timeline window, thus I can’t access the transport buttons – very frustrating & useless as it is. I assumed this was a limitation of the EZDrummer Demo, so when it expired I deleted it & purchased the software, only to find that the full licensed product has the same screen size issue. Neither solution above worked. Please – address this. 
