I'm running Acrobat Pro DC 2021.001 Continuous Installer.
I've tried using the 64-bit Installer Dov Isaacs pointed to at: https://helpx.adobe.com/acrobat/kb/download-64-bit-installer.html but it won't install, as it says I have a newer version installed.
Does the 32-bit version need to be uninstalled before the 64-bit installer can be run?
Is there a newer version of the installer?
Yes you must uninstall or you will continue to encounter errors.
If I am not wrong, the issue appears when the installation package is deployed. It runs a routine to discover if other installation packages are present.
If it detects prior installation packages present it will throw those messages.
Don't forget you will need all new plugins if you use Acrobat plugins.
Right. Fortunately PitStop has already released a 64-bit version.