You can download all the Contacts that you have personally made during an Event through the Web App.
If you want to export all the Contacts made by your Team for your Exhibitor Booth, read Exhibitor Booth: exporting your team's Contacts
Exporting Contacts on desktop via WebApp
Click on your name at the top right corner of the screen, and select My contacts in the drop-down menu.
Click on Download in the Export my contacts section. An Excel file with all your Contacts and their details will then be automatically generated and downloaded to your device.
How to manage different contacts made at different events ?
If you participated in different events under the same account, the connections you made at previous events will remain in your contacts list. To access all your contacts, click on on your profile picture, and select the My contacts tab.
If you were an exhibitor that was part of the same booth for at least two different events, you will have the option to choose the different booth chats from the different events when you go to into their separate chats.