I’ve never noticed any popping sounds, all the audio has been seamless for me. I’m a musician and audio tech, if you’re hearing popping it could either be the recording or something going on with your interface but the only way to tell would be to listen to the sound files themselves. I’d bet they’re in a standard format but might be difficult to narrow down among the many included files. I had a popping file in XPRealistic for X-Plane and took it into my DAW and declicked it with a plugin specifically to do that, but for that it was super easy to find the file as it was the reverse thrust audio and the sounds were in their own folder.
When are you hearing the popping? Is there a specific plane and instance you hear it? If so I can take a look in the files and see if I can find the file and give it a listen. If it’s in the file I can fix it and email it to you to overwrite the clicking file.