This is probably not what mostly people use the Tool for, but the "Get Version Report" command should spit out a few things in "Logs," one of which should be the firmware version for most devices that report it. I think something like "firmware version" and "firmware subversion" are the pieces you could put together to do this (e.g., "1" and "5" would be 1.5 or, as it is often displayed, 1.05--but keep in mind that these are equivalent).
Many drivers also display this in the "Device Data" section at the bottom of the device page. However, some drivers don't update this after a firmware update, and there's no standard for how to force it to re-check (a refresh or configure might). So, I suppose the Tool is one way to always see for sure. If you're using a C-7 hub, the built-in Device Firmware Updater app can also tell you--just go to the page in it where you choose deivces, and pick the one you're interested it. The "firmware targets" dropdown will then show you the version(s), and you can just back out or close it before you update (you don't even need to upload any firmware files to get this far).