We have found 4 software records in our database eligible for .xlsb to .xlsm file format conversion.
You can re-save (File ► Save..) .xlsb spreadsheets to .xlsm variant only using Microsoft Excel (version 2007 and newer). This converts the binary version of the spreadsheet to common version, with macros enabled.
May also be possible using other spreadsheet programs, but some Excel specific formatting may be lost during the process.
XLSB
Files with xlsb extension is used by Microsoft Excel spreadsheet editor distributed with the Microsoft Office. An xlsb file contains Excel workbook stored in a binary file format (BIFF12). The BIFF12 binary format is used for data that can not be stored in the Open XML text format.
XLSM
Files with xlsm extension are used for workbooks of spreadsheets created in Microsoft Excel that also include macros, that enhance the functionality of the spreadsheet but some automation features. Other spreadsheets might open xlsm files as well, however they most likely wont be able to use the Excel specific formatting and macros.