PREREQUISITES. (What you need to run the software.) 

You need to have one of the following:
    Microsoft Excel
    Office 2013 or later (2016 preferred)

    Office 365 (Desktop version, not the web browser version). 
  • To find out which version of Excel you have go to Excel -> File -> Account -> About Excel. 
  • To upgrade Excel, see the blue section below.
  • We recommend that you have a minimum of 8GB RAM, or when running the software that there is at least 1GB of RAM free. You can check this from Task Manager (right click on Task bar) 

Excel for Mac version 15.19 (160206) or later and OS X v10.10 "Yosemite" or later.
  • To find out which version of Excel you have go to Excel top bar and then 'About Excel'. 
  • To upgrade Excel, see the blue section below.
  • IMPORTANT! We have had some issues licensing Macs due to customers not being on the latest update. Make sure you have the latest update (Excel -> Help -> Check for Updates) 


  • You can read and edit your projects via OneDrive or similar.  You cannot change the model until back at your PC or Mac but there is a work around.  See manual for details.

Office Online!
  • V8 Developer will NOT work with the online versions of office (Office 365 Online or Excel Online. You can find out which version you have from your Programs and Features -> uninstall or change a program, or from within Excel -> File -> Account.) 

Correct Version ✓

Wrong Version ✖

Next Step >
Do you need to buy the latest version of Microsoft Excel?

Which version of Excel should I buy?

If you just need Excel, click one of the links to the right. 

However if you are looking for the full Microsoft Office at the same time, Caldes recommend office 365 (desktop version) as it gives you everything you need for a small monthly fee including huge Exchange disc space for email, backups, Excel, Outlook, Powerpoint and Word. 

Do not buy Office 365 online as it is not powerful enough for serious spreadsheets.

Click here to buy Excel for PC
Click here to buy Excel for MAC
Click here to buy Office 365

Click here for Excel Troubleshooting tips.