Canva Sheet to Editable Excel

I have an Excel file that was originally put together in Canva and then exported in a non-standard Excel format. It opens, but a lot of the cells are locked in place and I can’t comfortably add new rows, columns, or formulas.

What I need is a clean, fully editable .xlsx version that keeps the existing layout yet behaves like a normal desktop Excel workbook. Every cell should be editable, all merged-cell issues removed, and I should be able to insert additional data anywhere without breaking the structure. Feel free to streamline the file behind the scenes—unhide or re-create any hidden sheets Canva may have added—so it functions smoothly in Microsoft Excel for Windows and Mac.

Deliverable: one polished .xlsx file ready for day-to-day use, with no edit restrictions. If you spot any quick wins (e.g., simple formulas that could make future data entry faster) just include them and let me know where they are.