So I did a little more searching & found the following in the "Knowledge Base".
"Relay G30/G50/G90 Device Firmware 2.0 Update""NOTE: An XD-V75 Receiver is required in order to perform this upgrade. If you cannot access an XD-V75 Receiver via a friend or retailer, please contact Line 6 Customer Service for assistance. TBP12 transmitters must currently be loaded with firmware v1.03 or greater to upgrade via Monkey. If your TBP12 has an earlier version firmware installed, it will need to be returned to Line 6 for upgrading."
"Instructions for updating the Relay G30/G50/G90 Receivers:
Obtain an XD-V75 Receiver
Connect the XD-V75 Receiver to your PC or Mac using a USB cable
Disconnect, then reconnect the DC power plug for the XD-V75. "Loader Enabled" should be displayed.
Connect the XD-V75 Receiver to the G30/G50/G90 Receiver by using a cable with TRS to TRS (stereo) 1/4 inch phone plugs on either end. The cable should plug into the 1/4 inch audio output of both the XD-V75 and the G30/G50/G90 Receivers
Launch Line 6 Monkey, then Log In, then select "Relay G30/G50/G90 Receiver" as your device and follow the on screen instructions"
This looks like a losing venture so far.....I don't have a Line 6 dealer within 200 miles. Kinda bogus that Line 6 suggests the solution is to "borrow" a reciever, lol. Like everyone I know has one.
If no one on here has any suggestions, I might open a Support Ticket & see what Line 6 has to say.
If there are no options beyond replacing the G30 transmitter (not gonna mess around with that plastic thing anymore) or buy a whole new system, it might be time to check out the Shure stuff.