Nope. Direct editting in the profile didn't work.
I believe the "Set as Default" feature was introduced in 18.104.22.168 version, and it means to save the customized profile. The problem is that not everything is saved. Actually, all changes are saved (e.g. Audio,Video format, ...) except one thing, the Subpicture, which always is "Direct to video". In fact, after I pressed "set as default" after my changes in the configure screen, clicked OK, then clicked "configure" again, the "subpicture" immediately went back to "Direct to video". !!!!
I tried with 22.214.171.124 version also, and it still has the same problem.