[Fist]

I can import settings from Mimic 2 but not export settings from Mimic 3. Is this a known bug?

Just to clarify, are you trying export settings from one Mimic version, and import them into another? Because this won't work, too much has changed between 2.x and 3.x. I recently switched Mimic 3 to use the skin.helper.script for import/export skin settings. Please make sure you have that script installed and test Mimic 3.x again. Thanks!

No. For Mimic 3 (running on Amazon Fire TV 2, with OS 5 based on Android Lollipop), although the export reports success and creates a text file, it only contains these two characters:

[]

For what it's worth, I have successfully imported a backup from Mimic 2 to Mimic 3, but it's a very basic configuration.