Excerpt below taken from https://community.adobe.com/t5/acrobat-discussions/adobe-acrobat-pro-dc-32-bit/td-p/12766657 

Infigo Designer isn't compatible with 64 bit Acrobat, therefore we ask you use the 32 bit version. To install the 32 bit version please follow these instructions: 

Please remove the application using the Acrobat cleaner tool https://www.adobe.com/devnet-docs/acrobatetk/tools/Labs/cleaner.html reboot the computer and reinstall the application using the link https://helpx.adobe.com/acrobat/kb/acrobat-dc-downloads.html

To stop the Acrobat Reader DC 32-bit application from automatically upgrading to the 64-bit version, create the following registry key before the first launch of the application as described in the help page https://helpx.adobe.com/acrobat/kb/about-acrobat-reader-dc-migration-to-64-bit.html

SHORT VERSION OF INSTRUCTIONS:

1. If you have already installed Acrobat, uninstall using the Adobe cleaner tool: https://www.adobe.com/devnet-docs/acrobatetk/tools/Labs/cleaner.html
2. Restart your computer
3. Download the Acrobat DC installer from https://helpx.adobe.com/acrobat/kb/about-acrobat-reader-dc-migration-to-64-bit.html
4. Run the installer. Note: When you get to the final stage of the installer click "Finish" and NOT "Launch now" else you'll have to repeat steps 1 and 2.
5. Create the registry key outlined in https://helpx.adobe.com/acrobat/kb/about-acrobat-reader-dc-migration-to-64-bit.html
6. Launch Acrobat, it should remain as 32-bit

Getting the plugin to run (doing this on the Software node is critical):

NOTE:

If the above step does not work, use the Mapsoft Registry.reg - double click on it and install. Make sure that Adobe Acrobat is closed