Notes about the TTN file extension:
To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened
" (Windows 7) or "How do you want to open this file?
" (Windows 10) if you double-click the file. There click on "More apps"
and choose a suitable software to view such files on your PC or from email attachments.
The TTN file type is primarily associated with 'Tartan Generator' by Clan Heritage (trading division of Viking Technology Ltd.). This program dynamically generates almost 2600 registered tartans as well as allowing you to design your own.
Detailed information for file extension TTN:
File classification: Text
To change file associations press Windows Key
and then Apps and Features
> Default apps
> Choose default apps by file type
Invalid file associations could be the result of underlying issues within your Windows PC.