Thank you for contacting Intel Community. The Error 53 message may be due to the EPE DLL is missing.
Please download this:
I'm using the Office 365 ProPlus version of Excel in Window 10, there is no issue for me to select the parameters of 'Main' sheet. You do not need to unprotect any worksheet but can direct enter the required information to the remaining spreadsheet such as Logic, IO, PLL, etc. The 'Thermal Power(mW)' of 'Main' sheet will be updated according to your input.
I am unable to import a CSV file - this is my fundamental problem. I thought it was because of the error message I was receiving.
I was providing you my machine info because the EPE download page gave instructions for other versions of Excel and not the one I am using.