DOOM Retro v2.6.4 is now available. It may be downloaded here, and its release notes are as follows:

• Optimizations have been made to further improve the overall performance and stability of DOOM Retro.
• A bug has been fixed whereby an error would be displayed when trying to load doom1.wad.
• A new restartmap CCMD has been implemented that restarts the current map.
• Minor changes have been made to text that is output to the console.
• Further improvements have been made to the console’s autocomplete feature.
• A bug present in Vanilla DOOM has been fixed whereby the player would sometimes bounce off walls.
• The unbind CCMD will now also accept an action as its parameter, unbinding all keyboard, mouse and gamepad controls bound to that action.
• The resetall CCMD will now also reset all bound controls to their default actions.
• A bug has been fixed whereby the bottom edge of spectres and their blood weren’t drawn correctly in some instances.
• The effects of changing the r_blood CVAR between all and red are now immediate.
• Movement of the player arrow in the automap is now smoother.
• The vertical axis of a DirectInput gamepad’s right thumbstick when looking up and down will now be inverted when the gp_invertyaxis CVAR is on.
• The shadows cast by the monsters in DOOM II’s cast sequence are now more consistent with how they appear during a game.