I have installed version 4.56, but I am unable to import the attached XML file. The program opens the file selection window, but it does not proceed to the script selection process. The file refers to FENIX_A3XX (Guinselli Stream deck) and was downloaded from flightsim.to. Import procedure with previous AAO and Script file versions was completed successfully. 

Not much help, but the same, latest script imported as normal for me. 

No problem here.

1. Downloaded FENIX A3XX AAO Scripts & StreamDeck XL & PLUS Profile -> FENIX A320_5_5_amEKk.zip
2. Unpacked the ZIP file to a folder (selecting the script file from within the ZIP will not work, it must be unpacked first)
3. Started AAO, disconnected from the sim
4. Scripting->Import scripts->Select the file FENIX_A3XX_Scripts.xml from the folder where I unpacked the ZIP
5. The group selection displays "FENIX_A3XX"
6. Set the checkbox, clicked on "Import" => "IMport finished" => all scripts are visible in the scripts editor.