Same problem here. Since installing 11.31.
Since it is also possible to enter a flightplan into the TBM900 FMS by entering a plan into 124thATC, I tried that and that works. But if I delete that flightplan and try to manually enter a flightplan int the FMS again, Xplane crashes. Below is (part of, due to character limitation of the forum) the logfile of that crash.
Also, here is some text from the TBM logfile that may hint that there is a problem with the updated earth_nav.dat :
\X-Plane 11\\Custom Scenery\Global Airports\Earth nav data\earth_nav.dat: malformed data on line 1051
2019-02-04 11:19:46 TBM900[navaiddb.c:512]: Error parsing C:\Users\Peter\Desktop\X-Plane 11\\Custom Scenery\Global Airports\Earth nav data\earth_nav.dat: malformed data on line 2000
2019-02-04 11:19:46 TBM900[navaiddb.c:512]: Error parsing C:\Users\Peter\Desktop\X-Plane 11\\Custom Scenery\Global Airports\Earth nav data\earth_nav.dat: malformed data on line 2011
(This goes on for many more lines)
log.txt for X-Plane 11.31r1 (build 113100 64-bit)
compiled on Jan 24 2019 22:17:18
X-Plane started on Mon Feb 4 10:55:35 2019
This log file is generated automatically by Laminar Research applications and contains diagnostics about your graphics hardware, installation, and any error conditions.
If you need to contact tech support or file a bug, please send us this file. NOTE: this file is rewritten every time you start ANY of your X-System applications.
Windows 10.0 (build 17134/2)
This is a 64-bit version of Windows.
CPU type: 8664
Physical Memory (total for computer): 17118986240
Maximum Virtual Memory (for X-Plane only): 140737488224256
CPU 0: Intel(R) Core(TM) i7-7700 CPU @ 3.60GHz Speed (mhz): 3600
CPU 0: Intel(R) Core(TM) i7-7700 CPU @ 3.60GHz Speed (mhz): 3600
CPU 0: Intel(R) Core(TM) i7-7700 CPU @ 3.60GHz Speed (mhz): 3600
CPU 0: Intel(R) Core(TM) i7-7700 CPU @ 3.60GHz Speed (mhz): 3600
CPU 0: Intel(R) Core(TM) i7-7700 CPU @ 3.60GHz Speed (mhz): 3600
CPU 0: Intel(R) Core(TM) i7-7700 CPU @ 3.60GHz Speed (mhz): 3600
CPU 0: Intel(R) Core(TM) i7-7700 CPU @ 3.60GHz Speed (mhz): 3600
CPU 0: Intel(R) Core(TM) i7-7700 CPU @ 3.60GHz Speed (mhz): 3600
124thATC v2.0-a59 11:01:08 : Entering FMS Programming (processing 3 fixes)
124thATC v2.0-a59 11:01:08 : FMS cleared, entries now: 0
2019-02-04 11:09:02 TBM900[efis.c:2018]: assertion "ref != -1" failed:
Backtrace is:
0 0000000080030CB2 C:\Users\Peter\Desktop\X-Plane 11\Aircraft\X-Aviation\TBM-900\plugins\systems\win_x64\systems.xpl+40cb2 (efis_get_dest+a2)
1 00000000800C1E66 C:\Users\Peter\Desktop\X-Plane 11\Aircraft\X-Aviation\TBM-900\plugins\systems\win_x64\systems.xpl+d1e66 (taws_floop_cb+1f6)
2 00000000800CDC11 C:\Users\Peter\Desktop\X-Plane 11\Aircraft\X-Aviation\TBM-900\plugins\systems\win_x64\systems.xpl+ddc11 (main_floop_cb+7a1)
3 00007FFF77405202 C:\Users\Peter\Desktop\X-Plane 11\Resources\plugins\XPLM_64.dll+15202 ()
4 00007FFF773FB374 C:\Users\Peter\Desktop\X-Plane 11\Resources\plugins\XPLM_64.dll+b374 ()
5 00007FF61D5D48B4 C:\Users\Peter\Desktop\X-Plane 11\X-Plane.exe+a248b4 ()
6 00007FF61CC889B9 C:\Users\Peter\Desktop\X-Plane 11\X-Plane.exe+d89b9 ()
7 00007FF61D01311A C:\Users\Peter\Desktop\X-Plane 11\X-Plane.exe+46311a ()
8 00007FF61D880D87 C:\Users\Peter\Desktop\X-Plane 11\X-Plane.exe+cd0d87 ()
9 00007FF61CC8BAFC C:\Users\Peter\Desktop\X-Plane 11\X-Plane.exe+dbafc ()
10 00007FF61DA9FBC7 C:\Users\Peter\Desktop\X-Plane 11\X-Plane.exe+eefbc7 ()
11 00007FFF99113034 C:\WINDOWS\System32\KERNEL32.DLL+13034 ()
12 00007FFF9A1F3691 C:\WINDOWS\SYSTEM32\ntdll.dll+73691 ()