All of them just crash as soon as they are launched. I don't think I had changed anything in the folder before this started happening. I've tried with my plugins and preferences folder removed but no luck. The log.txt file doesn't have anything in it apart from the default text.
log.txt for Airfoil Maker 11.30r3 (build 113014 64-bit)
compiled on Jan 8 2019 20:12:28
started on Mon Jan 21 20:01:49 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): 17119686656
Maximum Virtual Memory (for X-Plane only): 140737488224256
CPU 0: Intel(R) Core(TM) i5-4690 CPU @ 3.50GHz Speed (mhz): 3500
CPU 0: Intel(R) Core(TM) i5-4690 CPU @ 3.50GHz Speed (mhz): 3500
CPU 0: Intel(R) Core(TM) i5-4690 CPU @ 3.50GHz Speed (mhz): 3500
CPU 0: Intel(R) Core(TM) i5-4690 CPU @ 3.50GHz Speed (mhz): 3500
X-System folder:'K:\Games/X-Plane 11/', case sensitive=0