WhizFolders is now discontinued
Important note for earlier customers!
The last stable version released was 7.5.2. If you have that version, it should continue working without any problems on Windows. But in any case, you should export your notes to RTF files from its Tools menu so that you can access them without using WhizFolders.
If you have not saved the installer and license codes, please check your last purchase email. If you have purchased within the last 2 years, the download link should still be working. Please save that installer EXE file along with the license codes from the purchase email in a safe place on one or more computers or on a cloud drive like Dropbox. That way you can install WhizFolders on other computers even if the download link stops working in future.