Does PPT Productivity work on both 32-bit and 64-bit Office?

Yes, it can be used on both. To check which version of PowerPoint you are using, do the following:
  1. Open PowerPoint, and click the File button (highlighted in blue in Figure 1). 

    File buttonFigure 1: File button
  2. From the File menu select the Account option, as shown highlighted in blue in Figure 2. Then, within the Product Information section, click About PowerPoint button (highlighted in red in Figure 2).

    Account option selected Figure 2: Account option selected
  3. This opens About Microsoft® PowerPoint® 2016 window as shown in Figure 3. Within this window you can find the information about the version of PowerPoint that you have installed, including whether it is 32-bit or 64-bit (highlighted in red in Figure 3). 

    About Microsoft® PowerPoint® window Figure 3: About Microsoft® PowerPoint® window