Extra Keys and Extra Keys Pro for MS Windows requires Windows XP or later and are available as 32-bit and 64-bit executables.
Extra Keys Pro X will run on most common, currently supported Linux distributions. Requires Xorg (X11) display management.
The programs are a fully portable and self-contained. The Windows install files are for convenience only, giving simple conventional installation with launch menu and icon. However, the programs can be copied and run from anywhere, including removable media, they may be directly extracted from the ZIP file.
All editions are free to use for any purpose.
For the ZIP file - just extract the appropriate file wherever you wish.
If you find Extra Keys software useful, please consider a donation to support further development
Just a small amount would help a lot.