We have just published mbeddr 0.9-EAP. This release is based on MPS 3.1.4 / 3.1.5 and comes with some bugfixes for the 0.8.1 release, but as well with some additional features:

• fully updated user guide
• graphical editor for visualizing component wiring
• ability to specify file system locations of gcc, make and gdb
• debugger provides extension points for integrating additional debugger backends

MPS in version 3.1.5 can be downloaded and installed from here:
http://confluence.jetbrains.com/display/MPS/JetBrains+MPS+3.1+Download+Page

You can get the 0.9-EAP Release from our GitHub release page:
https://github.com/mbeddr/mbeddr.core/releases/tag/0.9-EAP