The system is enabled on the Settings page under Database, Archiving and Synchronization.
Enable both the Using files for Archiving... and Save data to synchronize... switches, and be sure to select a folder for saving the mentioned files. The folder should be available for all computers involved in the synchronization process (a shared network folder, a folder in the cloud, etc.).
After that, all actions to change data will be accompanied by the generation of files with information about changes. These files will be written to the subfolder _synchro_data of the folder selected in the settings.
To perform the synchronization of data on each computer (not necessarily at the same time!) you need to start the process Load data to synchronize DBs. You can start the process on any thematic page for which there is a corresponding line in the pop-up menu of the 🛠 tool button. During the processing the names of the processed files will be shown in the pop-up panel, the result of processing will be shown there as well. After processing, you may need to reopen the page by clicking on its name in the left vertical menu.