Notes about the DFR 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 DFR file type is primarily associated with 'Visual DataFlex' by Data Access Worldwide.
DFR is the licence file for Visual DataFlex; an object-oriented, 4th Generation (4G) programming language geared towards creating database and client / server type applications.
DFR files verify the number of users against the DataFlex license in a particular enviornment. DFR files are named NUMBER.DFR where NUMBER represents the serial code for that installation.
Whilst the Personal Version of DataFlex can be downloaded for free, Commercial Licenses require a fee-based subscription.
Detailed information for file extension DFR:
Company: Data Access Worldwide
File classification: Archive
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.