Right now the program only supports Lemmy BE 0.18.1-rc9, but new releases will try to support new versions as they are released. The Lemmy API is changing a ton right now, but I'll try to keep up.
The culture appearing in the Lemmy/Kbin universe reminds me of some gaming communities where people help each other, some by giving advice or tips they've learned, others by using their skills to create addon tools to solve a problem.
For sure! The whole reason I made this was because I saw so many posts asking for a way to do this.
That said, it's obviously a stop-gap until the devs add an official way to do this via Lemmy itself, but the last time I saw them talk about that it was (understandably) pretty low on their priority list - and I'm not nearly comfortable enough in rust or databases to make a PR to Lemmy itself - at least not yet.
If you give me the instance I can confirm, but that field was added in Lemmy 0.18.3, and I suspect the instance you are trying to use doesn't support that yet. You can see the Lemmy version at the bottom of the page.
LASIM 0.2.0 only supports Lemmy 0.18.3.
LASIM 0.1.2 only supports Lemmy 0.18.2.
So you can wait for your instance to upgrade and then use LASIM 0.2.0, or you can use the older LASIM 0.1.2.
Note: if say your old instance is Lemmy 0.18.2, and the new one is Lemmy 0.18.3, you can use LASIM 0.1.2 to download, then use LASIM 0.2.0 to upload.
I hope I never have to use this since I really like my instance, but thanks a bunch for making it! I curate my feed by blocking all communities I have zero interest in, which results in a gigantic blocklist that would not really be feasible to migrate manually, so having a tool to do it is a lifesaver.
Edit: just because I'm curious and I know next to nothing about programming- would it be possible to port this to Android too?
Unfortunately not super easy to port to mobile because of the language I wrote it in - which in my defense, I chose because it's the same language as the Lemmy back-end and "official" API.
You are the second person to ask though so I guess I should have thought more about that!
We'll see how long the project lasts and maybe I'll consider it in the future, but the hope is that this is a stop-gap until Lemmy has an official method for transferring this data.