If you own a legitimate copy of RealFlight G5.5 (either the disc or a digital license), using an emulator to replace a broken dongle falls under "fair use" for interoperability. You paid for the software; you should be able to run it.
Not all emulators are created equal. Some older "cracks" from 2012 disable aircraft physics updates or the helicopter flybarless controller setup. You need a clean emulator. realflight g5 5 dongle emulator better
Software doesn't physically break. Once installed, the emulator is permanent. Lose your hard drive? Reinstall the patch. No waiting two weeks for shipping from a random seller. 5. Multi-Instance & Streaming Capabilities Hardware dongles are strictly 1:1. One dongle, one simulator session. If you own a legitimate copy of RealFlight G5