Solution:
An error 1309 is caused by attempting to run the installer before the contents of the download have been un-zipped. To avoid this error please right click the downloaded file and select “Extract All,” then choose a destination for the files to be extracted to. We recommend the desktop to avoid any confusion with the original download. Finally, please run the now extracted installer.
Error 1309 can also relate to the length of the path to the files, which means you will need to run the installer from higher up in the directory tree, i.e move/uncompress the archive to the top of your C: drive.
Please also remember to check for updates once you have run the main installer. Updates are found in your Toontrack account under My account > My Products > (the specific product) > Updates.