With the current update grip is now disabled in the default bindings for toggle window. If you're able, please use what is said in the tutorial, double press both A buttons. (Just replaced Grip with A basically)

This change was made as over the past year I've had a stable amount of users complaining about accidentally pressing Grip and causing windows to appear as it's so easily triggered on Index, along with users complaining that it's uncomfortable to perform the binding with large hands. This is why it was changed to double A in the tutorial about 18 months ago, finally, the bindings are catching up with this change. :)

To revert to the old bindings you can follow this tutorial to access the bindings panel in SteamVR:
https://www.youtube.com/watch?v=YzAPT8fKxZM

From there, set the following binding:
https://imgur.com/a/oNl0z1W

(Ensure you set single not double click! Due to a SteamVR bug with the Index Grip binding you cannot use double, OVR Toolkit will correct for this)

Sorry for the fuss! I know it's a pain to have to manually edit your bindings, but, this will benefit many (many!) users and provide a better overall experience for most OVR Toolkit users. Let me know in here or Discord if you have issues with adding the bindings back!