I figured it out!!
There's a thread in the Starter Kit forum that pointed to this. I had to read it a few times before I put it all together. So, just in case anyone else needs it...
For the 3.2 version, you need to use hex code decimals to program the buttons. Everything is listed under NEC Code Table here: https://github.com/Makeblock-official/Makeblock-Libraries/blob/master/makeblock/src/MeInfraredReceiver.h
Once you have the code for the key you want (up = 0x40, for example), swing over to Google and type in the equation followed by "in decimal", so in this case, "0x40 in decimal). Google pulls up a calculator and gives you 64. That's the number you're going to use to 'say' up in mBlock.
I ended up with something like this. Right now, I'm using the A button (60) to stop both motors.
I'll add in the ultrasonic sensor in the next few days, and maybe a couple other small changes, and post back if anyone is interested. I'm sure there are other beginners out there who are just as confused as me.
Thank you again for all of your help!