Office 2016 32-bit version installed instead of 64-bit version

Up until early this year, MS defaulted to installing 32 bit Office all the time. But back in the spring MS announced (Very quietly!) that it was changing the default to 64 bit.

Here is an article about that change

https://office-watch.com/2019/office-365-2019-change-from-32-bit-to-64-bit-with-little-warning/

Microsoft Office 365/2019 installation is about to change in a big way for all users – home and business.  The default is changing from 32-bit to 64-bit software in mid-January 2019.  Microsoft is giving little warning of the change despite the compatibility risks to customers.

https://support.office.com/en-us/article/use-the-office-offline-installer-f0a85fe7-118f-41cb-a791-d59cef96ad1c?ui=en-US&rs=en-US&ad=US

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No effect.

Your license allows you to install either version. And to switch installations between them as needed.

Also, I can't seem to download the offline installer.  Step 3 (https://support.office.com/en-us/article/use-the-office-offline-installer-f0a85fe7-118f-41cb-a791-d59cef96ad1c?ui=en-US&rs=en-US&ad=US#OfficePlans=signinmsa) under "Office for home" says "In the Download and install window, select Other options."  I do not get this, I only get the following options below:

The only option I can use is "I have an Office product key", which just has a link to the original install file I used (Setup.x86.en-US_ProPlusRetail_<<product key>>_TX_PR_.exe), which I don't believe has the option to specify 32 or 64 -bit.

It appears you did not log in to the www.office.com using your email account. Look in the upper right corner to see if you are logged in.

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If you, try going to the MyAccount site, log in, follow the instructions in the article you referenced:

This page provides an overview of licenses and / or subscriptions you have associated with your email. You can access it directly using this link, or reach it after logging in to the high level site.

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This page provides a list of the other email accounts you have shared a 365 Home subscription with. It also lists the computers you have Office 365 installed on and activated.  You can “remove” a computer here to free up an activation count to allow you to install and activate on another new computer.

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I was logged into my Microsoft account (snapshot below).  As I said, the offline installer option (where 32 or 64 -bit can be specified) isn't available to me, so until I can get a more concrete answer, I guess I am stuck with 32-bit Office 2016 Professional Plus.

That is Office.com.

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As I suggested before, try the "myaccount" site. It is the site MS designed for "managing" your Office subscription (and MAYBE your license).  But since it is Pro Plus it may not show up there.

This page provides an overview of licenses and / or subscriptions you have associated with your email. You can access it directly using this link, or reach it after logging in to the high level site.

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This page provides a list of the other email accounts you have shared a 365 Home subscription with. It also lists the computers you have Office 365 installed on and activated.  You can “remove” a computer here to free up an activation count to allow you to install and activate on another new computer.

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You have not said how you got it. Pro Plus is a limited distribution bundle, only through a "Volume" license or through the HUP, Home Use Program.  If you got it through the HUP, go back to the HUP site, at the bottom there is a "Contact Us" link. Talk to HUP specific help, they can help.

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