Another quick update here egofree has used the official vectored versions of the room icons and I have implemented the configuration manager for multiple configs. In addition to the previous room changes by egofree you can now have multiple constants and configurations. GMK will only read and write your first configuration and its associated constants. EGM still does not save constants, and will only save the first configuration like the GMK format. So for now you must use the GMX format to save multiple configurations and constants. You must always have 1 configuration and you get 1 default constants page plus a constants page associated with every configuration just like in GM: Studio.
Here is a screenshot of the new configuration manager. You must use this frame to work with multiple configs and the constants associated with them. The configuration selected on the main toolbar will be the configuration the game builds with, just like GM: Studio. Opening constants using the main toolbar or the tree node will give you the constants that are written for every configuration.
You can update just like always with the python install.py script or manually from the extra packages page, I will build a new portable when the EGM format is fixed, I can't do it myself as school is starting and I am busy studying.http://enigma-dev.org/docs/Wiki/Install:Extra_Packages
This was the commit where I fixed the icons to use Josh's official exported ones that are not aliased.https://github.com/IsmAvatar/LateralGM/commit/4276803806c22632efaf48751a6775e8936f7b27