How to Change Source Folder?

[VictorReinhart]

Hi,
I have about 500 files in version 9 of my project. They are in about 20 different Source Folders. I want to do a File, Save As, and make a new .SF5 file for version 9.1. I want to do a mass change of source folders from v9 to v9.1. I tried opening the SF5 file in Notepad to do this change, but SF5 says: "This is not a valid Setup Factory 5.0 project file. Use the Project Converter to update your project."

What is the best way to make this change?

TIA

[VictorReinhart]

Well, I did it by hand. No big effort, just selected multiple files and made the changes.