You can install both versions of the Wedge on the same PC however if you try to run both at the same time, what will happen is that Windows will run two instances of the same version that you run first. This is because they both have the same executable file name and Windows always checks before launching a program to see if the executable file is already in memory. If a program (or another program with the same executable file name) is already in memory then it simply launches another instance of the program from memory.