Notes about the TOPC 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 TOPC file type is primarily associated with 'TopicCrunch' by 3D-Scape Limited. TopicCrunch is designed to determine positions in search engines. TOPC files can be amended outside TopicCrunch provided the internal structure is retained. A simple text editor should be used, or if word processor software is used, the file should be saved in a plain text format.
Detailed information for file extension TOPC:
File classification: Text
Mime type: text/plain
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.