You don’t need to uninstall the trial version before installing the paid version.
No, your whizfolder documents won’t be deleted with uninstall. It is very important to understand that WhizFolders does not keep your documents but they are separate .wzfolder files in your file system. The main window of WhizFolders merely lists them and the list can be modified by the right-click menu. In the new version, WhizFolders also lists the location of the file. In the old version, you can see the location when you pass the mouse pointer over the document name. You also see it at the top in a blue label when you open the document.
If you have been creating your documents in My Documents, remember that you risk losing them on a Windows reinstall or if you accidentally delete that user. A proper back up of your documents and settings should be done regularly to avoid such mishaps.
It is always better to create your documents in a known folder that you back up regularly by simple copying.
