I would really like to use this software to manage my Knife Master build that I am just starting to use in a campaign. I was wondering if this could be added, or someone could point me toward a good tutorial on adding Archetypes myself (experienced Java programmer, but little free time with 4.5 month old)
When you load PCGen, switch to ADVANCED - Load Ultimate Combat along with Core, Bestiary, Advanced Player's Guide. Create your Rogue, and Knife Master will be there.
Knife Master verified as included in the source book. Probably Cause - Lack of Loading book.