Does anyone know how to make the Gauntlet level launcher work? Whenever you enter the passwords and press launch, it just returns 'Armada not found'. When you edit the conf file for single player manually, it works.

I am adding the level passwords here in case anyone is looking for them (as I was), they are extracted from WCNEWS.COM:

Confederation / Kilrathi
1
2 -!ARMGMIS2
3 -!CHT2LVL3
4 -!FLY2LVL4
5 -!WAYUPTA5
6 -!FITELVL6
7 -!CLOSETO7
8 -!WOWIMAT8
9 -!GOSHLVL9
10 -!TAKME210
11 -!WARPTA11
12 -!WHEWAT12
13 -!LUCKY_13
14 -!HVEFUN14
15 -!IMRDY415

Strange that they are not included with the game to begin with!

Problem solved by GOG Support: Simply download the standalone installer for Armada and install the game through this one, then the Gauntlet level launcher works as intended! You can easily add the game to GOG Galaxy afterwards.