This posting is older than 6 months and can contain outdated information.
If you are adventurous, here's the current beta build of Candelair version 1.24 for Yosemite:
The archive contains a version of the Candelair System Preferences pane that allows you to install a version signed with the new Developer ID. You may need to remove the "old" version of the driver (which also has the 1.24 version number and will be reported as the latest release) before installing this build.
### WARNING: This is an early BETA build that has not been widely tested. Use it fully at your own risk.
If you run
codesign -dvvvv /System/Library/Extensions/RBIOKitHelper.kext
in Terminal.app, the output will contain
1) "Authority=Developer ID Application: IOSPIRIT GmbH (UH96K9N25C)" for the beta build
2) "Authority=Developer ID Application: IOSPIRIT GmbH" for the version bundled with Remote Buddy
Hope that helps.