Performance & Upgrade CorelDraw

Hi,

Currently we are using coreldraw X3. We have Lenovo Core2duo processor with 4GB of RAM. whenever we open file (5/10MB) its taking around 5mts to open. its damn slow.Is there any options or patches to increase the performance?.
Can we able to upgrade to Corel X4if availble?. Is its a free upgrade?.

 

Regards,
Shivkumar.