Hi, Jerry.
?
1.1.6 means, that it based on the OEM BASE firmware 1.1.6. It's not compatible with any another BASE version because it's a replacement - it just erase BASE firmware and flashes new one (like during usual FW upgrade)
Most important differences is noise reduction logic and default rfg (63 for 1.1.6 and 100 for 1.1.8). You can check all changelog between 1.1.6 and 1.1.8 on the
I guess you can use it with APP 1.1.6-1.1.8 (or alternative GUI).
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Georgy // R2RFE