all I get is a USB device not recognized
This doesn't surprise me, based on the information given. The ASIO driver works completely independently from Windows, for good reasons described elsewhere. So Windows won't recognise the device, at least not based on the ASIO driver alone - which is the only thing you say you've installed.
You need to install and run a recording application that does use ASIO drivers, then that will recognise your amp (I assume you're not doing this, as you don't mention any such apps). You could use Ableton that came with your amp, or a freeware tool like Audacity, or other commercial tools - I'm not familiar with any of those, but others in this forum report using them successfully.
The Fender support website includes articles that describe in detail how to setup ASIO and Ableton to work together. Suggest you try that in the first instance. Note there is some setup needed within Ableton (or any other app) to configure the ASIO drivers correctly - you can't do this from any Windows O/S tools.
did you install the Fuse software?
I agree with this, you should also install FUSE. That will install the Windows drivers (solving the "USB device not recognised" problem), and will allow you to control / configure your amp from the PC. That opens-up lots of additional settings you can't access on the amp itself. You can also record sound using the FUSE USB drivers, but this isn't usually the best way due to latency and other issues - hence why most people use and recommend the ASIO driver and dedicated apps that use it.
If you do want to record using the FUSE USB driver (rather than ASIO), you'll need to go to Control Panel - Sounds - Recording
and make sure that "Show Disabled Devices" is selected. Otherwise your amp won't appear as a recording device. Plus of course you'll need a recording app that can use the Windows drivers rather than the ASIO ones.