Yes, QuickBooks Premier is different from the Pro Plus version, CashFlowDoctor.
QuickBooks Pro and QuickBooks Premier are simply two versions of the same core application.
QuickBooks Premier offers multiple, industry-specific versions. It supports up to five simultaneous users and is a good fit for those that need a good inventory/sales order management option.
While QuickBooks Pro is a great entry-level small business accounting application. And, it's an ideal solution for sole proprietors and small business owners. It also supports up to three simultaneous users.
Check out this link to learn what features are available for each version: Choose your QuickBooks Desktop product.
Additionally, you can open an existing Premier file in the Pro Plus version and vice versa. I'm adding this link to learn more about this: Company files compatibility with QuickBooks Desktop when upgrading.
Before making any changes to your file, always create a backup so you can go back and open the original file.
You can get back to me by commenting below if you need anything else with QuickBooks. I'll be around to help you.
