BRouter server overload

Brouter.de is my favorite router. But often the server is overloaded and I have to wait for loading the wanted map.tiles. The reason is in my opinion that the already loaded map.tiles are automatiaccly removed after one week and therefore the maptiles must be reloaded.

Suggestion: The time for removing the map.tiles on my PC should be set to some months. Then much less map.tiles would be removed and reloaded.

Regards Karl Schupp