the synchronization in Sticky Password 4.1 is unfortunately more difficult. It has been improved in Sticky Password 5.
In Sticky Password 4.1 you can only overwrite the Portable database with the one from your desktop.
So it will be necessary to export your database from your Portable version using an export feature and then to import the data from exported file to your desktop version and merge them. Then reinstall the Portable version or overwrite the Portable database with the one from the desktop.
We recommend you to backup the database files from both your copies of Sticky Password before performing this operation.
Please let me know if you need any details.