Soup Mail Outlook add-In ClickOnce installation errors

Some users may experience an error when attempting to install the Soup Mail Outlook add-In, with a message that looks something like the below images.

Please follow these steps to address this issue:

1. Exit Outlook
2. Uninstall the Soup Mail Outlook Add-In (if present), using Programs and Features from the Start Menu (find instructions to uninstall Soup Mail Outlook add-in here).
3. Browse to C:\Users\[username]\AppData\Local\Apps\2.0
4. Copy/zip up any existing folders/files found in this location to another location (this is a backup measure so that they can be restored if necessary)
5. Delete the folders/files from C:\Users\[username]\AppData\Local\Apps\2.0
6. Re-install the Soup Mail Outlook add-In (find instructions on how to install Soup Mail Outlook add-in here).