Why is the sound speeding up now?

I bought the app and paid to get rid of any ads or watermarks, but in a recent update all my videos are speeding up now. Why? Please let me know when this changes back, and Ill happily change my rating. I cant use this to edit any of my music postings anymore because of this problem...

Marco On Sax about Vizmato: Video Editor & Maker, v3.1.4