.XLT file extension
This is the list of programs to work with .XLT extension
Create flowcharts, network diagrams, floor plans, and other designs.
With Excel Viewer 97 can open, view, and print Excel workbooks.
Three full featured office applications: Writer, Spreadsheets and Presentation.
This update is to prevent other to run and modified in a malicious way a file.
You will have a better user experience by using this plugin.