I installed an app this morning: https://apps.shopify.com/mysize
After installing it it made a website I manage very slow and unresponsive, I have since deleted the app. Its slightly better now, however the store is still slow/unresponsive sometimes.
If anyone can help or offer guidance it would be very much appreciated. The store url is: https://walterbaker.com/
Does it take time to fix itself or is there something else I can do?