Amazon Seller Central Pro Account
The Sellics Seller Edition only works with a professional Seller Central account.
Other platforms such as Kindle for books do not work for Amazon's MWS API.
If you are nontheless having issues integrating your Seller Central, please check this article (click here).
One Seller Central per Amazon Marketplace
At this time only one Seller Central can be integrated per marketplace.
The available marketplaces, to which you can switch via the top right flag in the tool, are mentioned here.
PPC Manager Issues
If you are experiencing issues for your PPC integration, please check this article.