Link (requires login):
http://support.ptc.com/cs/help/windchill_hc/wc110_hc/
Even if you're on an earlier release, you might find the "New and Changed for this Release" topics interesting:
PTC Windchill Workgroup Manager
A few notes about using the help center (for those unfamiliar):
- It's supported for IE and Firefox. (In my opinion, it's best viewed in Firefox)
- You can view it in Chrome, but be advised that table borders won't render in Chrome.
- The help center can be frustrating if you're not aware of the Show in Table of Contents action:
Clicking this will orient you in the table of contents, allowing you to browse the related documentation.