Zandronum

Hello, i've got a problem trying to start Brutal Doom v21 beta, when i double click it, this thing appears:

OS: Windows XP (NT 5.1) Build 2600
Service Pack 3
M_LoadDefaults: Load system defaults.
Using program directory for storage

Execution could not continue.

You cannot -file with the shareware version. Register!

Could you please help me with this error? i would be very grateful

It won't work with DOOM1.wad which is shareware, I managed to reproduce this error. You'll need to get the correct IWADS which is obtained by purchasing the commercial software.