Set AllowMultipleInstances in .ini File on Build

I have hand-edited my exe application's .ini file to add the AllowMultipleInstances=true directive, and it works just fine. However, whenever I rebuild the applciation, I notice the .ini file gets overwritten, and I have to manually append the directive. Is there a way to specify the directive in the build process to avoid the manual step?

I am running LV 8.20.

Thanks

-Ted