how to index Sente library

Hi all,
I am a new user of DTpro2. I have been trying over the past hour to figure out how to index my Sente6 library? Can someone please point me to the right direction? I am not able to find the pdfs or the folder that contains them? I am allowing Sente to rename the attachment as Author year title.
thanks in advance.

Do not put your documents in a Sente library bundle. Keep them external from Sente. Then, index that location in DTP.

See this Sente screenshot from File > New Library:

Also, search this DT forum for "index Sente library" for further advice from others who have already discussed the topic.