Avoid! Reasonable app gone BAD (Unusable)

I used to accept the quirky interface because it was useful. Now the ads are OUT OF CONTROL. Its like a virus has taken over. I deleted it on the spot. Id rather do a google search for a conversion.
Why would I pay for ad free? Why would I trust the developers of this app, when it was previously so difficult to use? They have too little pride in their free version to be trusted.

jc45249 about Convert Units App, v7.5