[Nadia]

QBM pro seems an old version, with issues; the latest version with all known issues solved
is QBMproPal final. This one is distinctive by having colored tex in QBM.
Scroll size of selection windows is an adjustment that can be made by some added lines to conf.ini: the instructions are given within installation readme's as to how to do that... If selections are truly missing, then that is a new problem I have never heard off... I think you should try
the latest version, and if problem persist you should ask where the mod is downloaded for assistance...

Her is an example of the lines that appears in my conf.ini MODS section:
( these need to be created under some guidance...) and proper to the mods I have:

[Mods]

PALMODsColor=0
PALQMBLinesMap=10
PALQMBLinesPl0=25
PALQMBLinesPl1=20
PALQMBLinesPl2=19
PALQMBLinesPl3=18
PALQMBLinesPl4=18
PALQMBLinesPl5=18
PALQMBLinesPl6=18
PALQMBLinesPl7=18
BombBayDoors=1
SideDoor=1
SpeedbarTAS=0
SeparateGearUpDown=0
SeparateHookUpDown=0
SeparateRadiatorOpenClose=0
ToggleMusic=1
AirShowSmoke=0

This might not work at all for you and you'r mods, since settings depends on screen size, resolution, the driver you used et.c.
Gives you an idea that settings do exits, like color = 0 turns my text to black. :|

OMG: there is a time when planes selection is restricted and this is called for by the map/missions themselves: for instance Coral sea map
offers only planes with arrestor hooks. Select different maps to see if all have the same problem.