Microphone doesn't work anymore after deinstalling the app.

Hi there. I had downloaded the Voice AI app today, but found it wasn't what I was looking for, so I uninstalled it pretty quickly after. The problem arrived afterwards, when I found out that my microphone now doesn't recognize any sounds anymore. This (of course) wasn't the case beforehand, but now it seems to be broken. Any help from others that know a solution / had similar problems?