I can recreate it. I went one step further and edited ini\hbmame.ini.. "mouse 1" ... and it is not loaded as a default. When you exit, it does not revert to... "mouse 0". Both 32 and 64-bit. Windows 7. Seems that a default hbmame.ini is created then ignored. I also changed... "writeconfig 0" to "writeconfig 1" It did not make a difference.