Index Analysis data not loading after waiting 4 hours

The query joins on three tables of which the Fact table is partitioned by month. It also has a number of non clustered indexes.
The one Dim table has no indexes and the other Dim table has a Non-clustered Columnstore index and a Unique non-clustered index.

I'm using SQL Sentry Plan Explorer V3 Build 11.0.116.0

Under the "Index Analysis" tab it's been saynig "Please wait" for 4 hours now.

Please assist.

Kind regards,
Dan