After buying the tax software, I found out that I could not install due to not having a 32 bit OS. Thus I had to upgrade the OS. Because of that, my old 'ant agent' was no longer supported.
So, I found that I had to install Garmin Express / Garmin Connect. This turned out to be a benefit, as now with the AP auto-load, it is a one-step process, rather than download a TCX, and then upload.