Sorry, I did not notice your issue and not received an email notification about it.
The following line should work for you:
OpenCppCoverage --modules modules\ -- MyProgram.exe arg1 arg2
Note: If your path (or args) contains a space, you must use double quote: "C:\Dev\My Folder with space\MyProgram.exe".
Release build is not yet supported in OpenCppCoverage 0.9.3.
Please let me know if it solve your problem. If not, can you provide more log?