Install on stemadeck not working single player.

[s10mods]

So I have a Linux PC that I installed Zandronum on using this wiki. https://wiki.zandronum.com/Install_Zandronum_on_Ubuntu
It works just fine and I mainly use it to play Doom and Doom2 single player, I like the updated graphics and controls, it gives the old games a new life. I just picked up a steam deck and installed Zandronum via the discover software center. When I launch Zandronum it only opens Doomseaker, I cannot figure out how to get the single player working like my PC that just worked. I also don't have the directory to put my wad files in like I did on my PC. I'm not really interested in the online play, just single player.

[s10mods]

Are there different versions of Zandronum? I just tried the flatpack from my software manager on my Linux PC and it does the same thing the steam deck does and only opens doomseeker. The icons are also different looking for the flatpack vs the wiki installed version.