This developer is a scammer. I purchased a permanent license for calendar widget (which was a separate app) a long time ago, then the developer deleted that app from the Play Store and published a new license app, and eventually pushed something to remove the license info from this app. So when it told me that "trial has expired" I tried to restore the purchase, but it was failing, and developer is not responding to emails. I guess everyone who paid for the original license app got scammed.