X-Plane Remote troubleshooting
From X-Plane Wiki
The X-Plane Remote app used with X-Plane 9 running on Macs and PCs has an issue. If X-Plane Remote crashes, the problem may be that the you turned on the EFIS-APP option in the X-Plane, not the Remote option as needed. The solution is to not check the EFIS app box in X-Plane if trying to run Remote. If Remote does not run at all, then you will need to update to the latest version of X-Plane on your desktop or laptop (version 9.61 or later) to correct the issue.
For more information, see the section from the X-Plane Remote manual on Configuring an Up-to-Date Copy of X-Plane.