Hi Alyssa,
Office 365 does not have this selection. Office 365 provides the latest version of Office client. You can use it on both PC and Mac machines. So you didn’t unknowingly select anything and need not worry about this.
When you login to Office 365 portal and download the software, it can identify your system. If it is a PC, you’ll be provided Office 365 ProPlus. If it is a Mac machine, Office 2011 for Mac is provided.
To download Office applications, follow the steps below:
1. Login to the portal of Office 365 with your account.
2. Click Office 365 Settings icon on the top right.
3. Click software.
4. Click Office> install.
Are you encountering issues in the procedure above? What platform do you want to download the software on?
Thanks,
Kevin Cui