Project files vs. database
ETS5 stores all projects as files and does not use a database. It is however not possible to bypass the export/import procedure in order to transfer/copy projects from one PC to another.
Via the general ETS settings it is possible to change the default path for project storage.
ETS also foresees functionality in order to recover project data and to create project backups, the former is called 'restore points' and the latter 'archive', more details here.
The default path for the project store is 'C:\ProgramData\KNX\ETS5\ProjectStore'.
This may not be set to a network shared or cloud folder because the project files that are contained in this folder may be destroyed. Those files should only be accessible and edited by ETS.
Via the general ETS settings it is possible to change the default path for product storage.
The paths for the Product and Project storage have to be different.