I believe it’s this issue for 0.0.36, where it will always use your account’s preferences: https://github.com/dessalines/jerboa/issues/887
It looks like a temporary fix is already done, so it should be fixed when they make a new release (0.0.37). As a quick fix for 0.0.36, it looks like if you change your account’s preferences, quit the app and reopen, it’ll use those new settings (but that’s definitely a pain), you could also use the web version.
I got a Supernote A5X to read papers - I’m very happy with it and wouldn’t want a tablet. I specifically wanted a dumb device dedicated to notes/reading that I wouldn’t connect to the internet, which really helps me focus. The eink display is easy to read and is a great break from screens, it feels natural to write on.
However it’s not perfect - eink has a small lag in turning pages, so if you intend on flipping through a ton of pages while coding that may be a pain. The searching experience also isn’t great, typing takes longer because of the lag. I use it as an advanced notebook rather than a smart device, and I love it from that lens.