Thanks. I looked in the device manager, but the com port did not match up to the manual options on AlphaOBD, but in the process I found a way to change the connection type in AlphaOBD from bluetooth to the actual OBDlink EX USB option, and it worked. I ran into some glitches that made it frustrating, for example, it would only let me connect one time, and then it would fail unless i restarted my computer and re-opened AlphaOBD. But I was able to perform the TPMS pressure change successfully, so thank you all for your help. Next move is to adjust my tire size.
AlphaOBD is pretty awesome. It doesn't have instructions though, it seems I can only find out how to do things from YouTube, etc. My brother has an F150 and Forscan, and he said they have some spreadsheet that shows you all the things you can do on it. Wondering if there's something similar for AlphaOBD?