Trend Line

I updated the from Free BI Service to the 30 day Pro trial version and all my trend lines disappeared. They are no longer an option in the analytics.

I can still create them in the free desktop version, which is prompting me to update.

Two questions:

1) How do I put trendlines into the Pro trial service version?

2) If I update the the desktop version, will the trend line option disappear there?

Thanks!