DOOM Retro v5.1.1 is now available to download as either a 32 or 64-bit Windows app. Here’s a list of what’s changed since the last version:

• These improvements have been made to the support for John Romero’s SIGIL II:
  • The registered version of SIGIL II is now supported.
  • The correct sky is now displayed.
  • The correct background is now displayed on the intermission screen, and a crash no longer occurs if SIGIL hasn’t also been loaded.
  • Improvements have been made to the “SIGIL II” text in the episode menu.
  • The player now warps to the correct map after finishing the secret map.
  • The titles of Thorr’s music are now displayed by the mapstats CCMD when playing the registered version of SIGIL II.
• Minor improvements have been made to the parsing of bossaction in MAPINFO lumps.