DOOM Retro v2.9.1 is now available. It may be downloaded here and a 64-bit version may be downloaded here. Its release notes are as follows:

• Optimizations have been made to further improve the overall performance and stability of DOOM Retro.
• The support for John Romero’s megawad SIGIL has been greatly improved.
• Minor changes have been made to text that is output to the console.
• A crash will no longer occur if the player’s health is less than -999% when they die and the widescreen HUD is displayed.
• A dead player will no longer turn to face an attacker if that attacker actually killed a voodoo doll rather than the player themselves.
• Things with the MF2_FLOATBOB flag set will no longer float and bob if they are also corpses.
• A bug has been fixed whereby the player wouldn’t die as intended when exiting certain maps in Eviternity, causing them to erroneously retain their weapons and ammo when warping to the next map.
• If the WAD selected in the WAD launcher causes DOOM Retro to exit with an error, the wad CVAR will not be updated.