Please check the user manual first (EN/DE) and find the knowledge base and answers to technical questions in the FAQs of the former eBlocker GmbH. Mac and iOS users please read this article in case of certificate issues.
Suggestion regarding Blocklists and costs
Wouldn´t it make sense to abandon cost-intense commercial lists for eBlocker?
There are a lot of good lists out in the wild, and new things coming up e.g. the DuckDuckGo traker radar ( https://spreadprivacy.com/duckduckgo-tracker-radar).
It would be a benefit to use the budget for the technical development of the eblocker an use opensource lists.