After you install PB2CS, a shortcut of PB2CS has been placed on Desktop. You can double click on it to run PB2CS.
The following picture shows PB2CS window.

A. Inputs a destination path for placing the C# files generated by PB2CS.
B. Chooses the output path.
C. The PBL file list that you want to convert.
D. Adds the .pbl files to PBL file list.
E. Removes a PBL file from the PBL file list.
F. Clicks on the 'Convert' button to convert your pbl files to C#.
G. Clicks on the 'Exit' button to exit the program.
After you click on the 'Convert' button, the following Window will be pop-uped on screen:
1. Click on the 'Done' button to close the Window.
2. Click on the 'Report' button to view the report that you selected the PBL file in Report List.
3. Double-Click on the item of Report List to view the report.
Then you could open the new C# project(.csproj) file with Microsoft Visual Studio .NET to build and modify the new source codes manually.