See this thread:
https://discussion.mcebuddy2x.com/t/how-to-copy-the-sagetv-properties-files-along-with-the-converted-file/226

Two step process:

1. Open profiles.conf and in the profile section that you are using, copy the following lines to the end of the profile (between the ***** lines):

********************
PostCustomCommandPath=C:\mcebuddy\copyassets.bat
PostCustomCommandParameters=""%sourcefile%" "%convertedfile%" "%destinationpath%""
PostCustomCommandHangPeriod=300
PostCustomCommandCritical=false
PostCustomCommandUISession=false
PostCustomCommandShowWindow=false
********************

2. Create a file c:\mcebuddy\copyassets.bat
In this file paste the following line (between the ****** lines):

********************
copy "%~f1.properties" "%~f2.properties"
********************

Save it and now you're done.
MCEBuddy should copy the original properties file along with the converted file after renaming it to converted filename with .properties extension