I have, in the meantime, taken the "dirty road" by just copying the "lif_1" folder and ibdata1 file from the data folder over into my MariaDB path. (Copying the whole thing lead to the service not being able to start up anymore, these two however suffice.)
Shows up in HeidiSQL just fine, I'll see if it worked in a few minutes I hope. If I don't come back all teared up, it probably went well
Side note: I've seen that networking was specifically turned off for the "embedded" DB. I suppose that would need to be changed, or else a tool that may connect via named pipes. (Assuming that this setting actually works and disables TCP networking.)
Anyways, so far it looks good. And I realized that I should have tried before asking. Sorry for that. After knowing the paths, the rest was pretty straight forward.