Notes about the ACAS 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 ACAS file type is primarily associated with 'Advanced CATaloguer Pro' by Evgeny Software. An ACAS file is a temporary file with '*.acas' extension appended to the original file name. If the Advanced CATaloguer Pro crashes, you can recover the unsaved catalogue from the '*.acas' file.