Test the new Aspect Ratio effects options. Also, under the preview window, choose MATCH MONITOR.

It is best to complete and export a project with the VP version that created it. Usually, backwards compatibility is good. But recent versions have changed the manner in which certain effects/aspects are handled, which may cause anomalies with projects from earlier builds.
If you don't succeed, please share your project so others can analyze it. Here's how... http://nch.invisionzone.com/topic/23659-tips-for-getting-help-on-this-forum/
If it contains sensitive material you can link it in a personal message (PM) to me, via the envelope above. Be sure to FILE|SAVE PORTABLE PROJECT AS, not simply SAVE PROJECT.