as for now we have to use the old 1.6.5 release of the Arduino-IDE. For a project with an Maple-mini I needed to install a version 1.6.13. So I looked for a solution to separate both installs and found something a very easy solution that I was not aware off...
If you install using the zip-files to "install" your Arduino-IDE rather than the installer itself and place a folder called "portable" in the directory, your Arduino-IDE completely behaves like a portable version and places everything in this directory. (Preferrably you create the folder BEFORE you start the arduino-ide the first time)
Now I can have a 1.6.5 for Z-Uno, a 1.6.13 for the Maple-min and a 1.8.1 for my Arduino installed in parallel!
I didn't know this before and I hope that someone find this usefull as well.