Older custom steel section databases created by users do not show up within the Section Database for the STAAD.Pro Connect Edition.
Details on how to convert older section database files (mdb) to the newer format (.db3) can be found here
Steps to Reproduce
Note : You may not be able to launch the Section Database Manager from within the Specification ribbon menu after you make the change. However the user sections should be accessible
The problem has been addressed in the STAAD.Pro CONNECT Edition version 21.03.00.146.