.rpt won't open after modifying

Hi everyone,

I'm new to the crystal reports, after modifying the rpt files directly by opening in Visual Studio 2015, changing the Database path also, when I open the project (a VB6 that I've converted to work in VS2015), and try to open the file, i get this error message 'one or both of these files are not text files and cannot be opened une the comparison window' indicating two different paths for the file to be registered.

Please need your help. PS, i didn't compile the project yet.

Many thanks in advance.