You can find your world files at this location on Windows
Paste this path into the "File Name" section of the window that appears when you choose your DB and FWL files and you should see all of your single player worlds.
Please remember that you must have both files, and that they must be for the same world. You can safely ignore any .db.old and .fwl.old files, they are not needed.
You can find your local V Rising save files at this location
From this path, open the folder with your unique GUID and inside you should see numbered AutoSave folders. Open the most recent one and create a ZIP of the AutoSave folder CONTENTS so it looks like the screenshot below:
Use the ZIP file you just created in the Upload Save section of our control panel. You can also follow these instructions to upload a save from another server host as well, just create a ZIP of the CONTENTS of the AutoSave folder you would like to upload.