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Thanks for letting me know.
I've been looking into this issue today and so far could only reproduce a kernel panic when booting in safe mode.
The issue is triggered by a bug in the kernel of OS X 10.11 and can even be reproduced with previously perfectly working sample code provided by Apple.
A new build of Remote Buddy with driver version 1.27 is now available at https://www.iospirit.com/products/remotebuddy/download/
You can remove the kext with this procedure:
1) Press Cmd + R, power on your Mac and hold these keys until you see the Apple logo. This boots into Recovery Mode.
2) If your OS X install is located on a FileVault protected partition, use Disk Utility to unlock it, then quit Disk Utility.
3) From the "Utilities" menu at the top of the screen, select "Terminal.app"
4) Enter these three lines into Terminal.app
cd /Volumes/[Name of your boot partition]/Library/Extensions
rm -rf RBIOKitHelper.kext
touch .
5) Reboot
Sorry for the inconveniences caused! If you happen to run into any issues using the new Remote Buddy build, please let me know.
Thanks,
Felix