Looks like you uninstalled SQL database before initial synchronization with cloud database. You can delete C:\WooPOS folder or C:\WooPOS\LocalSettings folder. Reinstall WooPOS by using a different Email account. There’s no difference between the free version and the pro version installer. We’ll send you the bill monthly based on your last month’s usage.
How many vendors do you have? Each vendor will have their own products, inventory, and employees? Do you want them to sell on your website and use their own POS with everything separated?