RazorGage has TWO kinds of RazorGage. If you get an RG3, you can communicate with Stratus through an experimental version of the WorkstationApp. If you have the older RazorGage, you will need to see the page on RGST: https://gtpservices.atlassian.net/wiki/x/VoIFaQ
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Open RG3, click on Settings, and , enter the password (5239 in the default case), then go to the Remote Control tab, where you will be able to pick the COM4 (recall. Again, this is COM4 in our case, because COM4 is one of the ports added when we added our new cable – see above steps):
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From here, you 
can select the COM port earlier found:
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If that does Not Work: Manual Method of Setting COM port for RG3
If that won’t work, then open explorer and go to:
C:\RG3\Parameters
Now right-click on “MachineParameters.json” and edit with Notepad
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