Just downloading this program and was looking at stats for various classes, but it hangs when I select certain classes. After having a look at the stats file it seems to be classes that iNumberOfRounds set to 0. I just reinstalling TF2 so the tf2_playerstats.dmx was recreated off the server. This ends up with classes having stats from previous plays but iNumberOfRounds equalling 0.
I'm running Windows XP x64 and v.1.3.45, Build 060708A of the program.
slog.txt always ends with this three lines with only the class being different, obviously.
6:37:27 PM: Class is DEMOMAN
6:37:27 PM: Added information to detListA
6:37:27 PM: Added information to detListB
I've attached my tf2_playerstats.dmx so hopefully you can reproduce the bug. Demoman, Heavy, Spy and Engineer are the classes that hang when selected.
File Attachment(s):

tf2_playerstats.zip
(3kb) downloaded 1 time(s).
slog.txt
(9kb) downloaded 0 time(s).