Long story short, I ended up with two of these Mikroe click boards a couple of months ago:
MIC 2 CLICK and RS485 CLICK 3.3V
This is was before I purchased my Arduino Uno R4. And also, I did not purchase the Arduino in hopes of getting the two click boards to work....all that being said, I happen to see this shield for the R3 Uno here: Arduino UNO click shield
...which got me thinking. Is there any reason why this Mikroe Arduino UNO click shield would not work with my R4? I am still learning things so I just don't know enough to be sure so asking here. Any advice or suggestions would be appreciated. The item is inexpensive so really no big deal if it doesn't work out but I'd rather not accumulate any more stuff than I already have. 