If you don't want to deal with license keys at all, these tools offer similar screen mirroring and receiving capabilities for free: AirServer (Limited Trial) / LetsView (Completely Free):
: Reflector 4 uses online validation; "leaked" keys are usually blacklisted quickly. reflector 4 license key free better
If the free options don't meet your needs, the paid version is a one-time purchase. Try the Reflector 4 screen-mirroring receiver software free If you don't want to deal with license
