This post wasn’t accepted in the Analog Four/Keys OS 1.40: bug reports thread so let’s try here instead:
In “List of changes from OS 1.35B to 1.40” it is stated: “Added support for Elektron Transfer.” However, when going to the A4mkII support page on elektron.se, Elektron Transfer isn’t listed for download. When instead going to the ARmkII support page, you can download Elektron Transfer 1.1, but this software doesn’t work with Analog Four mkII.
When asking this question in the main thread for the A4 1.40/AR 1.50 release I was told that the compatibility referred to Elektron Transfer 1.2, which isn’t public yet.
As of now, I would consider this a bug. If you write that a device is supported by a certain piece of software, but don’t mention a version number of that software, the most reasonable interpretation is that it is at least supported by whatever version of that software that is out at the day of the release of the patch.
So, update the release notes and make it clear that it’s Elektron Transfer 1.2 that is supported, and preferably say something about this on the A4mkII support page. Or better yet: Make the Elektron Transfer 1.2 release public 