We have found one software suitable in our database for this conversion.
dex to xls conversion is probably searched by users that own some very old spreadsheets and want to recover the data to Excel. It might be actually a little problematic to handle ancient file types in modern software, but when it comes to data files/spreadsheets you can always try to bruteforce import of the data to Excel, select a proper separator and see if that works.
Updated: August 17, 2023
DEX
Files with dex file extension could also be found as old spreadsheets from some earlier version of Microsoft Excel.
XLS
Files with xls extension are best known as spreadsheets from Microsoft Excel. A spreadsheet is basically a grid of cells sorted in rows and columns. Each cell can contain text, numeric or formula data. Excel XLS spreadsheets can be opened in most other similar programs, such as OpenOffice.org Calc.