DCS Crashing at high altitude

so i have a reoccurring bug. anytime i either load Mig and fly to or start the game at over ~25,000 the whole thing crashes to desktop. i've never seen this before. is this happening to anyone else?

what is happening is:

1) take off full afterburner

2) climb quickly to high altitude

3) after reaching around ~25,000 feet, DCS crashes to desktop without explanation

OR

1) create mission in ME and put Mig at starting point ~35,000 feet

2) load mission

3) crash to desktop

[ATTACH]206469[/ATTACH]

Do you have any mods installed?! There are different "Manifest hash check failed" error messages in the log.

Maybe try disabling them if there are any or try a repair.

2019-03-15 22:45:53.589 ERROR   SECURITYCONTROL: Manifest hash check failed for file 'textures/atlas_mountain_maple'
2019-03-15 22:45:53.603 ERROR   SECURITYCONTROL: Manifest hash check failed for file 'textures/atlas_billboards_mountain_maple'
2019-03-15 22:45:53.622 ERROR   SECURITYCONTROL: Manifest hash check failed for file 'textures/norwaysprucebark'
2019-03-15 22:45:53.628 ERROR   SECURITYCONTROL: Manifest hash check failed for file 'textures/atlas_billboards_norwayspruce'
2019-03-15 22:45:53.629 ERROR   SECURITYCONTROL: Manifest hash check failed for file 'textures/atlas_shrub'
2019-03-15 22:45:53.653 ERROR   SECURITYCONTROL: Manifest hash check failed for file 'textures/atlas_billboards_shrub'

The following seems to me not related to the MiG, but rather to terrain (edterrain4.dll), maybe bound to the above mentioned problems?

2019-03-15 22:46:17.164 INFO    EDCORE: try to write dump information
2019-03-15 22:46:17.167 INFO    EDCORE: # -------------- 20190315-224617 --------------
2019-03-15 22:46:17.168 INFO    EDCORE: DCS/2.5.4.28461 (x86_64; Windows NT 10.0.17134)
2019-03-15 22:46:17.169 INFO    EDCORE: C:\Program Files\Eagle Dynamics\DCS World OpenBeta\bin\edterrain4.dll
2019-03-15 22:46:17.170 INFO    EDCORE: # C0000005 ACCESS_VIOLATION at 65F2301A 00:00000000

Regards