While Windows Insiders are waiting for a new Build 105XX with big jump in version number from existing Build 10166, Microsoft has now updated the Windows Insider app in store. While there seems to be only one visible change and “Terms & Conditions” are now called “Programme Agreement”, there may be under the hood changes, as the next build is supposed to come from a different branch.
Build 10512, which is a highly probable candidate for next preview comes from TH2_RELEASE branch. You may need to enroll to “Insider Fast” once again after updating the app.