In-game (x64 or x86 version), windowed. ShiftWindow (+ border = borderless). FOV Fix: Hover at window top-left for menu; Settings, Rendering Options, change "lateral field of view" to 93.4, press Esc to close (FOV is approximate, change as needed; default was 60).

(PLP screenshot with bezel effect. HUD view via Shift+W)
NOTES:
1. Runs stable & looks decent. But cockpit layer is sometimes vert- or offset downward (none or a lot, depending on airplane).
2. Cockpit layer is optional (Ctrl+W removes it). HUD view (Shift+W) seems to always look good.
3. Optional NoMousy (not recommended): mouse pointer is useful, but can be removed if it irritates.

(FA-22 Raptor fighter jet. Cockpit view)

(clean view, via Ctrl+W)
Cockpit Comparisons:

(big plane)

(1080p, big difference)

(small plane)

(1080p, small difference)

(fighter jet)

(1080p, no difference)
View guide for general help with the instructions.