Fix saving and opening to previous versions. Currently saving to version 19 from 21 does not work.
We wanted to upgrade to CDS 2021 but found it to slow, the Object Manager to confusing and unstable when bringing in DXF data from 3rd party mapping applications.
Have you tried 2024? You can even trial it on the web without having to install it! https://trial.coreldraw.corel.com/