Steve,

 I tried replacing the file, but I was not able to get the service to start afterwards.
Here is what my system is.   4.19.0-6-amd64 #1 SMP Debian 4.19.67-2+deb10u1 (2019-09-20) x86_64
So I used the MMDVM_Bridge.amd64 and removed the .amd64 of course, reset the machine, but the service did not deem to start properly.  I had to replace the original file for that to come back up properly.
 Any idea where I should look further into this?
many thanks, Walter/K5WH