I pushed the new memapper to github. It's been tested to run on Arch Linux, almost-latest OS X, and it should work on Windows, but I don't have any with a relatively recent jre to test on. Reports and comments are appreciated, but the editor is so barebones/useless that I'm not going to be disappointed by the lack of them. Here's the changelog copypasted from github:

Changelog:

• A completely new state model which makes stuff accidentally both simpler and faster by using Reagi library
• GUI is a lot cleaner due to new state model making it easy to put the whole dom in a treeview.