I found a discussion here:
https://discourse.ubuntu.com/t/community-process-for-32-bit-compatibility
I don't understand why there is no package yet to upgrade 19.10 because it seems that even the packages from 19.04 do the job:
wget http://mirrors.kernel.org/ubuntu/pool/main/g/glibc/multiarch-support_2.29-0ubunt...After that you can install Pro Motion.
sudo apt install ./multiarch-support_2.29-0ubuntu2_i386.deb