I had the 2.2.11 version of pleco with my older phone. I bought a new phone after the old one broke and downloaded the new version. I prefer the design and format of the previous version. Is there a way I can download the older version?
No, even if we could give it to you it wouldn't work at all on a newer phone - would crash immediately on startup or soon after.
The version 3 transition guide in the manual includes explanations of a lot of the new behavior plus some advice on how to do things that were done differently in version 2 / options for how to roll back some of the changes.