Switch back to original user interface?

Hello all together,

I am a new owner of the DSO203. On the first day playing around I installed the alternative user interface. Now I am not able to go back to the original one. Can anybody help me, how I install the original?
I downloaded to the DSO now the sys_152, the App_107, and the FPGA_222 and still have the alternative UI. What did I miss?