DOOM Retro v3.5.1 is now available, in both 32 and 64-bit binaries. Its release notes are as follows:

• Optimizations have been made to further improve the overall performance and stability of DOOM Retro.
• Minor changes have been made to the character set used in the console.
• Minor changes have been made to text that is output to the console.
• Monsters can now be spawned using the spawn CCMD when the nomonsters CCMD has been entered in the console, or the -nomonsters parameter has been specified on the command-line.
• The following changes have been made to the widescreen HUD:
  • The HUD has been brought in slightly from the edges of the screen.
  • The player’s armor is now on the left side of the screen next to their health, and the ammo for their currently equipped weapon on the right.
• Item and teleport fogs are now spawned when using the spawn CCMD.
• Thing triangles in the automap representing MBF-compatible helper dogs are now the correct size again when using the IDDT cheat.
• Minor improvements have been made to the menu’s background.
• The player’s view is now reset again when exiting the menu.
• A bug has been fixed whereby the use of LIQUID or NOLIQUID in a MAPINFO lump would have no effect.
• The scrollbar in the console has been widened and now includes a grip.