I can correlate this CK release with any of DF releases..

I have DF 20.0 latest upadate release installed here (DF 20.0.7.156), and the CK that I have installed is 20.0.10.103

Code:
DataFlex 2021 Studio 20.0 - 20.0.7.156


Runtime Version: 20.0.7
Package Version: 20.0.1
FMAC Version: 20.0.112
Javascript Engine Version (MASTER): 20.0.3.156
Javascript Engine Version (WORKSPACE): 
Platform: 64-bit
Database driver(s): DATAFLEX, MSSQLDRV (20.0.10.103), DB2_DRV (20.0.10.103)
MSSQLDRV Client Version: SQL Server (SQL Server 2000 client)
Not sure where this 20.0.19.x you have came from.. maybe you have an intermediate special release between this and 20.1 base ?