You can make further changes by creating and placing a file with the same name ini-file (picapport.ini), next to the picapport.exe file. This file has to be created manually. Here is an example of the content:

• Xms512m

• Xmx1024m

In this example, the initial memory as been set to 512 megabytes and maximal memory to 1024 megabytes.
For more information see http://jvmmemory.com/ or here (if you use PicApport.exe)