Notes about the SLSTL 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 SLSTL file type is primarily associated with 'On Schedule' by Squidge Software. .SLSTL extension is a List File which is locked used in the On Schedule Application. It keeps data from the user's input into the On Schedule application. On Schedule is a program developed by Squidge Software.