Good morning, yes 0. I pressed Save 1. I am sure because deactivating the plugin restores the cache to functioning, activating it the opposite 2. yes the effect is immediate as per #2 and I did try to activate and cleared the cache, still did not work and 3. honestly I am not sure. Having said all that, Thank You! Because the link you provided with the altered plugin worked fine, I activated it and the cache still functions.