There is no installer.
Simply copy and run the "GitForce.exe" executable on either a Windows or Linux PC from any location where you want to keep it and the "installation" is done.
GitForce is also not dependent on where in the file system it resides; you can move it at any time to another location.
The tool needs a git command line support and, optionally but highly recommended, a diff utility.
The screenshots shown on these pages and in the documentation may differ from the actual application due to differences in software versions and those of a particular setup (and the fact that I don't update screenshots regularly).