If you have problems with Duke's Developer commentaries or Addons for WangGDX, redownload the BuildGDX. The problems were fixed.

BuildGDX:
Music looping support added
Incorrect voxels offsets in software fixed

BloodGDX:
Numerous animations fixes

WangGDX:
Darts option
Disable Hornets option
Infinite ammo cheat (swinfinityammo)
EvilBunny attack animation fix (original bug)
TiltLeft/Right feature
Jetpack cheat feature
Show opponent weapon feature
Underwater changepalette freeze fixed

DukeGDX:
Dukematch (nospawn) mode friendly fire fixed

TekwarGDX:
Cops won't attack you if you visited men's toilet on SUBWAY0
Palette fade in software renderer fixed

WitchavenGDX:
Enemies' pickaxes and halberds can now be picked
Dynamic music for WH2
Enchanted weapons sound loop fixed
Numerous maps fixes
Custom campaigns support

BuildGDX:
Parsing files with { and } in filename fixed
Incompatible save will now load a map from the save file
BloodGDX:
HUD scale added
Beasts sounds fixed
Extra option for tilefromtexture token fixed
Powerup timer now resets when powerup is picked up again
DukeGDX:
Legacy DukeTalk precache fixed
If addon has a custom intro cutscene, it will be played at episode start
Cooperative checkhitsprite with friendlyfire fixed
Fireflies spawning in dukematch fixed
Weapons can now be switched before being fully raised
PowerslaveGDX:
Powerup timer indicator added
Improved aiming
RedneckGDX:
8 Track player added
Shuffle music option added
Dead cows blocking shots fixed
Weapons can now be switched before being fully raised
WangGDX:
If addon has a custom intro cutscene, it will be played at episode start
Double UZI holster crash fixed
DoSkullBeginDeath and DoBettyBeginDeath crash fixed
(WT) Sumo boss not spawning on Skyscraper level fixed
(WT) Floor aligned pickups fixed

Build:
low performance near walls that use sky texture fixed
screen dimming after deleting a save in software fixed
underwater reverb after exiting a level fixed
lots of crash fixes 

Shadow Warrior:
crash when dying with open inventory fixed
added sound for the girls
flashbang now makes everything go white
autoaim can be changed in SP without restarting a map
fixed submerging with crouch toggle button
invisible key on Crazy Train (TD) fixed
unreachable secret on Warehouse (TD) fixed
unreachable secret on Military Base (WD) fixed
medium HUD added
auto switch weapons on pickup option added

Blood:
wrong voxels offsets fixed
added definefileid/rffdefineid def token
improved aim

Powerslave:
grenade throwing with power up fixed
sector lighting not affecting sprites fixed
damage after jumping over lava fixed 

Duke 3D:
medium HUD added

TekWar:
CD audio now works

BuildGDX:
Single-core CPU low performance fixed
Software renderer drawsprite fixed
BloodGDX:
tilefromtexture surfaces support
PowerslaveGDX:
Palette load fixed (Initialization crash)

WangGDX:
1. Railgun noise sound fix
2. Multiplayer kills update fix
3. Underwater crouch toggle
4. Loading last saved game after death 
5. Special_Fire button
6. Underwater reverb after finishing a level fix
7. ViewCamera in software renderer fix
8. Armor display to the minimal HUD
9. HRP tint
10. Savegame version increased
11. Crash fixes