The functionalities between the DEMO version and the regular version are totally the same. So there’s no random noise or a popup window that force you to buy. On top of that, you can even save and read patches presets in the trial version. The only difference is that you can use the trial version for 20 days, After that the plugin doesn’t work anyone. If you were happy with the results during the trial period, you can buy the regular version by clicking the BUY button. After the purchase, you can continue using it without reinstall.