@slim: There's recent builds of all public cores available at https://github.com/FPGAArcade Also keep in mind you may need a newer firmware (a build from 2018 will do) for the Acorn Electron. I've held off doing a new "release" for that until a new firmware has been rolled out. Although that's the only core I'm aware of that depends on a newer firmware.
There hasn't been a new set of zipped releases in a while due to a few reasons, amongst them, Mike has been heads down finishing up the daughter board, cpu changes and working on the replay2. Also there's a migration coming from svn to git which will require a new method of doing releases.
Hopefully as things settle down after the move to git changes will be a little more visible to people 