Clarification - Nextcloud Sync 2020

Update, I’ve looked at your other post. It seems point 6 is not available to me. e.g

“On Machine B, select Import Database… from Preferences > Sync and follow the dialogs”.

This option is missing. I can’t import the database. Though I think in it you meant to say import the sync store rather than the database, either way, I can’t import the sync store.

EDIT: Your instructions indicate to add the sync store location first. I can only add a new sync store alongside the existing sync stores. I assume if I could connect to an existing sync store the import database option would come alive correctly. I assume this is what I did last time. But since I can’t add the existing sync store, I can’t import the existing database. Hope that’s clearer.

Thanks.