I received this from inquiring with FLI

Official response from FLI

Below the download for FLISetup, there is
" CenterLine Filter Wheels
After installing one of the kits above, download the following updated FLIFilter application."

I think that may help with MaxIm, but the ASCOM driver in that setup package was only for focusers.
Try the ASCOM driver in the Kepler section. It might support CenterLines.

Best regards