Fields form other plugins not selectable

I am using Version 1.5rc5.

I created a query at this link:
http://www.robotiklabor.de/podcasts

I have another wordpress plugin installed, called BAW Post Views Count.

This pluging shows the the number of access numbers of each article / page and I like to use these number of accesses to be added to the query abobe. But I can not chose the fields when creating the query.

How can I access fields from other plugins in a query?

http://ww.wp.xz.cn/extend/plugins/query-wrangler/