As Maverick pointed out, the MP shortcut is no longer valid/used for 1.5.0 (and later on) so just start DCS as normal and use MP from the main DCS menu.
I have changed the way my seat is "fixed" to the MDF base of my "pit" to give the seat more shake (before it was screwed in meaning the vibrations were bit less intense as base sits on the floor and can't shake that much... but with these springs installed its another story :pilotfly:
This has been reported.
Issue is MiG-21 model numbers need to be typed with exace number of digits that skin is designed for. For example if skin needs 3 digits and user enters 1 only the holes will show.
So type in mission editor right number of digits untill this is fixed.
For bort number 3 type 003 etc.
I noticed this also, happens when scrolling to the side. However I have checked it if it happens in the Testers version and it doesn't so, now I am not sure if I should report it or not.
EDIT: Reported
For me I don't have this, I see pilot figure and cockpit in the mirror
There is however clipping issue (but this is not your issue, which as per my screenshot, I don't have) which is already reported
Su-25T airbrakes are not overly effective so there is good chance this is not a bug. Please test deceleration with airbrakes extended and not... is there distinct difference?
There is bug report already for missile sound in external while missile is supersonic (doesn't happen once subsonic), Bug #29091 (http://bagi.eagle.ru/view.php?id=29091)