Keep a copy of your all your po files as a backup.
Use your tool such as poedit to update the strings in your po file.
Update from sources.
The string position or text could be different in this Evolve Plus due to additional features.
From you po edit interface you will should be able to see additional strings or updates. Do the translation and save. The mo file will be auto generated.
You can download poedit here.
There is no need to purchase premium features, the free features are sufficient.