BillyMoney

Hello, I got this website where I've been WHMCS for about a year, and i have some module/add-on installed which I dont use. I wanted to install a new WHMCS and import data (clients, products, invoices, configuration...etc) from the old WHMCS to the new WHMCS? If for example from the database I copy all the content of tblclients from old WHMCS and import it to the new WHMCS, will this approach work? I've also tried ImportAssist but for some reason it could not import data. it show an Not Found error. What is the recommended way to migrate data (clients, products, invoices, configuration...etc)?