I was testing PowerBuilder 2021. One thing I wanted to try was to migrate an application from PB 2019 R3 to 2021 Beta and then test it. After I wanted to use PB 2019R3 2670 runtime (from PB 2021 IDE) to rebuild that application. But it seems that this isn't supported. I thought that after PB 2019 R3, we should be able to go to a previous runtime version. Am I wrong? Maybe I haven't understood something?