There is a 16-bit and 32/64-bit version available.
Linux versions for 32 and 64-bit based systems do also exist.
If using the old, 16-bit version, you can simply drag-and-drop the compressed executable onto UNLZEXE. Successful decompression is heralded by the creation of a *.OLZ file (which contains the old, compressed file). This works on most windows systems up to Windows Vista.
Otherwise it must be run in DOSBox using the following commands:
Z:\>mount c "C:\the directory\the game is in" Z:\>c: C:\>unlzexe keen?.exe
- Note: ? is the episode number of the executable you want to unlzexe.
32/64 bit version
In those versions you don't need DOSBox or mount anything. Just the following:
It will generate file.exenew which is the extracted version. You can also use the drag and drop method here on any windows version!
- Note: 64-bit Windows versions should be able to use the Win32 bit build.