Having the same issue. It keeps looping between S1Game/Localization to Engine/Localization infinite downloads
Ok after several tests, anything that's "empty" or "0kb", seems to get stuck in a loop.
THis is how i managed to fix it:
Engine/Localization : Delete everything in there
S1Game/Localization : I deleted everything but the EUR folder (we're only going to be using the EUR datacenter)
Run app.bat again
Also delete these in your local client as well as the launcher will not remove them
S1Game/CookedPC/UITextures000.tfc The launcher REFUSED to download this, stuck in a loop of repeated download/unpacking over and over again. This is a 0kb file, so I sent this to the two people that are playing on my server and had them delete the folders above and put UITextures000.tfc in the S1Game/CookedPC directory and delete their local.db and have the launcher repair
This managed to get them into my server.
Hope this helps and hope this helps @
hsdn figure out what's going on as this launcher is amazing and I cannot thank enough for it.