I have SU1 beta, i have cleared the WASM folder, started a flight on the runway, connected Navigraph, synced navdata, then closed the sim.
Was able to start a flight at EGSS at a gate, perfomed pre-flight, pushed back, started the engines, set takeoff config, started taxing, then realised that i did not have a button on my thrustmaster TCA flight stick for the brakes, so opened the settings, assigned a button and saved. When resuming the fligt, the sim was down to 10 fps and unusable.
Come om Inibuilds, this is just not good enough for a plane that costs 72 euro.
All the included other airliners in my premium edition work fine, apart from a few small issues that can be handled.
I really hope your working on a patch for this.