The National Instruments myRIO requires to have the same Real-Time module installed on as the one that is installed with LabVIEW to be able to use, if an old version is installed on the myRIO then when you plug the myRIO in the “NI myRIO USB monitor” will disable LabVIEW from the menu (see fig 1), if you are using the latest version of LabVIEW then you will need to update the firmware* or use an older version of LabVIEW.
* Updating the firmware will delete all code installed on the myRIO.
Instructions on how to update the BIOS and firmware on the myRIO:
When installing LabVIEW 2014 and selecting the myRIO toolkit it doesn’t automatically select a required module, you will need to select the LabVIEW 2014 Real-Time Module. This will install the myRIO examples and the Vi’s required also it then adds the myRIO environment this changes the splash screen to display “LabVIEW myRIO 2014”