DOpus 4.12 is latest that work on Amiga OS 1.3.
That adf you can mount on WinUAE as floppy or open with ADFOpus (
http://adfopus.sourceforge.net/) or adfview (
https://www.viksoe.dk/adfview/) on Windows. There is also TotalCommander plugin called AmigaDX (
http://www.coderbug.rs/projects/amigadx).
There is also free DOpus 5 at
https://sourceforge.net/projects/dopus5allamigas/. It's for AmigaOS3, AmigaOS4, MorphOS and AROS.
I like more DOpus version 4.