Randy, back to your question about my setup and number of working displays:
Now I have connected 5 TM1637 displays(+ Max) but I work with my testing, newer firmware, that was not included yet to the SimVIm database.
Now we have included this firmware with updated timings for TM drivers. Download the uploaded today SImVim.dat file, replace it in the plugin folder, and re-upload the master firmware to your board from the plugin.
Good luck, hope all your displays will work better.