Where Does Catan Universe Store Local Data?
Catan Universe keeps login and local data in AppData\LocalLow\United Soft Media Verlag GmbH\Catan Universe on Windows, deletable to fix corrupt logins.
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Catan Universe stores local login data in a publisher named folder under LocalLow, with gs_default files inside marking game instances. Corrupted tokens there cause the notorious cannot reach server errors despite working internet.
The official fix deletes that exact folder and restarts, which rebuilds clean state. Real progress lives server side on the account, so local deletion costs nothing durable. Linux runs the same tree inside the Proton prefix.
Where Catan Universe stores this, by platform
%USERPROFILE%\AppData\LocalLow\United Soft Media Verlag GmbH\Catan Universe
Login tokens plus gs_default instance files. Delete to fix corrupt logins with game closed. Server accounts hold real progress.
~/.local/share/Steam/steamapps/compatdata/544730/pfx/
Proton prefix for app ID 544730 mirroring the Windows tree. Same deletion fix applies inside the prefix.
Frequently asked questions
How do I fix Catan Universe login errors?
Close the game and delete the United Soft Media Verlag GmbH folder to force a clean login state. The folder recreates on next launch. Back it up first if local progress matters, since deletion is final.
How do I back up Catan Universe?
Copy the whole publisher folder with the game closed, since login tokens plus local files travel together. Server accounts hold the durable progress. Reinstalls regenerate the folder automatically.
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