Check out some options how et files might be converted to xlsx format.
In order to save .et spreadsheet to Excel format (.xls, .xlsx) you have to use the original program Kingsoft Spreadsheets, as no other spreadsheet programs seems to support ET format. With a simple File ► Save .. function within the programs you can produce Excel spreadsheets from your .et files.
Unfortunately, there is no detailed software record in the database for this conversion.
Additional links: Open et file, Open xlsx file
ET
Files with et extension can be mostly found as spreadsheet documents for the Kingsoft Spreadsheet program from Kingsoft Office.
Files with et suffix may be also found as lesson files for Easiteach classroom / whiteboard software.
Files with et extension can be mainly found as projects from ETwin technical software.
XLSX
Files with xlsx extension are s used by Microsoft Excel for its workbooks (spreadsheets) in Office Open XML format. XLSX is the latest spreadsheet format used by Excel with the adoption of XML formatting first used in Office 2007. While older xls files were in proprietary binary file format, xlsx spreadsheets use a somewhat altered XML scheme.
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