I have been using Windscribe for a couple of years and have found a similar thing happening to me - I open the app and select a location, but the IP does not change. Apart from app updates, I have not found anything has changed since I first started using it.
The fix for my problem was simply to close the app, close any web browsers that are open, switch the wifi connection on your computer off and then back on, and then re-open Windscribe and use as usual. Works each time for me.
Good luck!
JB
