ADE 3.0 does not work with Big Sur

I use a Nook eReader to download library eBooks from my local library.    I had to replace my old MacBook Pro running OS X El Capitan version 10.11.6 and purchased a MacBook Pro running Mac OS Big Sur 11.3.1 using the new Apple M1 chip.

The only version of ADE that works with Big Sur is version 4,5.   My problem is the file format for the Nook eReader is not supported by ADE 4.5.

Does anyone know if Adobe will update ADE 3.0 to work with Big Sur ???