If you have any problems, then firstly try to read FAQ and Support forum of free version, because most of troubles are the same.
Problem with café creating
If you used a free version, and then installed a paid one. Then you need to re-create all the cafes and delete the old ones!
The cafe is not displayed on the page
Check if you have right specified the shortcode. You must indicate your cafe’s id in the premium version (example: table-reservation cafe_id=”268″ ). Also try to update the cache.