The ArcMap Raster Editor can be installed at any computer that have installed ArcMap 10.X. Be sure that you select and install the correct library compatible to a specific version because add-ins are not backward compatible. Add-in is a new feature introduced since ArcMap 10.0, so the tool is not compatible with ArcMap 9.3 and earlier versions.
Note: The beta version can only support ArcMap 10.2. The following release will have fully compatibility.
The ArcMap Raster Editor is using Visual Studio 2012 in C# based on .Net Framework 3.5 and ArcObject SDK 10.2. If you want to follow or rewrite the project and use other platforms, please check the following guide.
Solutions of different version of Visual Studio are completely convertible. If you are not developing on Visual Studio 2012, the most convenient way is to use tool like Visual Studio Project Converter to convert my project to the proper version. Or your can manually modify the RasterEditor.sln:
Microsoft Visual Studio Solution File, Format Version 12.00 # Visual Studio 2012
Microsoft Visual Studio Solution File, Format Version 11.00 # Visual Studio 2010
Microsoft Visual Studio Solution File, Format Version 10.00 # Visual Studio 2008
Because of the minor difference among ArcObject SDK 10.X, it is easy to move the project to other versions by replacing the incorrect libraries.