I have downloaded and saved onto a USB Memory Stick - networx_linux_amd64.deb
It is 1.4MB in size.
When I click this file, it opens a Ubuntu Software window for Networx, which includes an “Install” button, and the information “Details, Size, 5.1 MB”. When I click this button, it changes to “Installing” for about two seconds. Nothing else happens.
So does it revert to Install or changes to Installed or Reinstall?
If it reverts to Install, I guess there may be something wrong with the package. In that case, you can try unpacking and running the ELF-binary directly. You may also need to have installed Indicator Systemtray Unity to have NetWorx's icon displayed.