No more Dolby AC3 in Adobe Media Encoder 2018

I can confirm that AME 2018 lacks Dolby AC3 settings.

AME 2018 - No more Dolby AC3. Only Mpeg and PCM

I installed the new version and forgot to uncheck "Remove Old Versions", so I re-installed AME 2017 from CC App Manager.

If you need AC3, go get AME 2017 now while it's still available, and remember DO NOT REMOVE OLD VERSIONS next time you update.

AME 2017 - With Dolby AC3

Interestingly, after two installs of AME 2018 and 2017, I cannot install another older version. Only option now is to Uninstall.

Are we limited to installing two versions of the same App?