delete logs in a tsidx index

Hi at all, I installed Splunk App for BlueCoat. I loades some test data and now I have to delete them before loading the production data. Logs are loaded in the "bcoat_logs" index and I haven't problems to delete them. Instead, the problem is that App loaded logs also in a tsidx index and I don't know how to delete them. Anyone can help me? Thank you. Giuseppe