I have the same problem since updating to 4.1a.
Using Windows Vista SP2, get this error on attempting to load Pathfinder before it shuts down:
Code:
C:\Program Files\Hero Lab\HeroLab.exe
4.1a 349
major: 6, minor: 0, build: 6002, platform: 2, version: Service Pack 2, spmaj: 2, spmin: 0, suitemask: 00000300, type: 1
ACCESS VIOLATION
Address: 0x20646c75
Type: unknown type
UPDATE: It loads fine for other game systems, so the issue may be Pathfinder specific. Additionally, loading works fine for all games when I started HF while logged in a Admin.
While logged in as Admin I tried setting permissions to allow my normal log-in account full access to HF, then switched back to my normal account and ran HF "as Administrator", but it threw the same error.
-k