Make sure you follow ALL of the steps below:
How to get the maps working
1. Unzip the maps in BHD Demo folder, there should be 2 files with each unzip. One is a BMS file and the other is a BAT file. Namely, TDMM_01a.BMS, TDMM_01a.BAT, TDMM_01b.BMS, TDMM_01b.BAT, TDMM_01c.BMS, and TDMM_01c.BAT.
2. In the same folder there's a file called demores.pff. Copy it somewhere same. Copy ok? Don't remove it. I've a folder inside BHD Demo folder where I keep all my files that I need to back up. Its called Original files.
3. Run each BAT file, mentioned above. This will replace your original maps that came with BHD Demo. You will stil be able to play the stock maps.
4. Start BHD Demo, and Host.
Happy shooting!