Starting with ADvendio Version 2.82 ADvendio if Lightning Ready. This means you can completely use ADvendio with the new Lightning Experience activated.
If If you're already a customer of ADvendio looking to activate Lightning Experience in your Salesforce Org see also 8.8 Activate Lightning for detailed information about steps you need to undertake and the most important difference compared to using ADvendio in Salesforce Classic.
App Launcher
Administration is not done using the Overview Tab anymore but can be handles directly using apps and the App Launcher.
Activate Connected Apps OAuth Usage
...
The process is fairly easy and done in two steps. Every user has to do this one and only has to repeat this if the administrator revokes access.
...