Rhino keeps crashing when using Maxwell 5 plugin on MAC

My Rhino keeps crashing when i try to turn the fire on in the maxwell plugin for Rhino and i cant render with maxwell plugin for Rhino. I get the following error -

Process: Rhinoceros [2799]
Path: /Applications/Rhinoceros 2.app/Contents/MacOS/Rhinoceros
Identifier: com.mcneel.rhinoceros
Version: 6.20 (6.20.19323.01022)
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: Rhinoceros [2799]
User ID: 501

Date/Time: 2019-11-25 12:20:44.466 +0000
OS Version: Mac OS X 10.14.6 (18G103)
Report Version: 12
Anonymous UUID: 0560223D-CC70-2BF3-EDAD-56115EA61316

Sleep/Wake UUID: 8E44584F-F16A-40B3-A3EE-04B7EEB2CA87

Time Awake Since Boot: 7600 seconds
Time Since Wake: 2300 seconds

System Integrity Protection: enabled

Crashed Thread: 0 tid_307 Dispatch queue: com.apple.main-thread

Exception Type: EXC_CRASH (SIGSEGV)
Exception Codes: 0x0000000000000000, 0x0000000000000000

Termination Signal: Segmentation fault: 11
Termination Reason: Namespace SIGNAL, Code 0xb
Terminating Process: Rhinoceros [2799]

Application Specific Information:
[ERROR] FATAL UNHANDLED EXCEPTION: System.ArgumentOutOfRangeException: StartIndex cannot be less than zero.
Parameter name: startIndex
at System.String.Substring (System.Int32 startIndex, System.Int32 length) [0x00004] in <58fec105cf57445bb2c0c7448bbc82b3>:0
at maxwell_rhino.Exporter.getExportNameWithoutExtension () [0x00043] in <567a192543874311803fa72c07cb1131>:0
at maxwell_rhino.FireEntities.FireDisplayMode.StartRenderer (System.Int32 w, System.Int32 h, Rhino.RhinoDoc doc, Rhino.DocObjects.ViewInfo view, Rhino.DocObjects.ViewportInfo viewportInfo, System.Boolean forCapture, Rhino.Render.RenderWindow renderWindow) [0x0006d] in <567a192543874311803fa72c07cb1131>:0
at Rhino.Render.RealtimeDisplayMode.OnStartRenderer (System.IntPtr realtimeViewport, System.UInt32 w, System.UInt32 h, System.UInt32 docSerialNumber, System.IntPtr view, System.IntPtr viewPort, System.Boolean forCapture, System.IntPtr rw) [0x00030] in <0496ef763bbe4c7fb6c0f2e449a0d889>:0
at (wrapper native-to-managed) Rhino.Render.RealtimeDisplayMode.OnStartRenderer(intptr,uint,uint,uint,intptr,intptr,byte,intptr)

Can anyone please help with this?

Hi Rebecca - please contact Technical Support at Next Limit for help with this.

Hi Rebecca,
Having the same issue from the 1st day using Maxwell 5. Did you find the solution?