I want to help you with your conversion question from Mac to Windows.
There are separate QuickBooks versions for Mac and Windows PC. If you decide to use Windows, you need to buy the correct version for it, namely Pro, Premier and Enterprise.
You can choose one license if you only want to install it on one PC or multiple licenses for different workstations. To get to know more about the features you can enjoy with this program, compared to other desktop programs, see this link: Choose your QuickBooks Desktop product.