Office 2019 posts confusing error message on Excel regarding use of 64-bit version

Hello everyone,

I am confused and surfing the web does not provide me with an answer.

I have just purchased a new PC and have the "Office Home and Student" 2019 installed. I have opted for the 64-bit version as I need to handle large, intricate Excel files. The description under "Account" in Excel does confirm that the 64-bit version of Excel is installed.

I then opened an existing (old) file that had been produced on the old computer with the 32-bit Excel (Version 2013).
Problem: When using the file and entering new data I find everything is working rather slowly (oftentimes I have to wait 30 seconds until simple calculations are performed). What really confused me was that after some time I got an alert saying that Excel couldn't handle the calculations with the existing resources and I should consider using the 64-bit version of Excel......
I thought I was using that verison all along and that you cannot use two versions of Excel alongside each other on the same computer anyhow. What could be going on here? Do I Need to convert the old existig Excel files before
opening them?

Many thanks for any light you may be able to shed on this!

Best regards,
Excel_Arate

Dear Richard,

I have the 64-bit version of Windows 10 installed.


Best regards,

Tim

Hello everyone,

Is there really noone out there who can help me?? Do I need to convert 32-bit files to 64-bit ones when changing from Excel 2013 to Excel 2019?

Best regards,
Excel_Arate