Notes about the ETFF 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 ETFF file type is primarily associated with 'Theme Maker' by Encrypt4allSoftware.
ETFF files are theme files created by Theme Maker for 'encrypt4all' software products.
Themes let you customize the look and 'feel' of software products for a more personal and assuring user experience.
Detailed information for file extension ETFF:
Primary association: Theme Maker
File classification: Desktop Publishing
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.