Ensure you have .NET 5.0 for Windows installed. You only need the .NET Runtime unless you are planning to build from source.
Next, download or build the tool and copy the files to a folder such as C:\tools\jumpfs.
You'll need to ensure that the folder is on the PATH. Add this to your autoexec.bat file or change it in system settings....
@PATH=%PATH%;c:\tools\jumpfs
That's it! Jumpfs should be available when you start your next CMD session. You can confirm this by running jumpfs_info.