Hi there, Hackgar,
Let's get a new QuickBooks Desktop Enterprise 2018 without losing your existing data. This is to ensure you have the latest release of the system.
Before proceeding, make sure to backup your company file to prevent data from accidental loss.
To download the installation file:
- Go to the Downloads & Updates page.
- Select your country, product, and version.
- Click Search.
- Hit Download to get the file.
- Follow step 2 and 3 to install and activate the product.
- Once done, restore the company file there.
Also, I recommend checking out the System requirements for QuickBooks Desktop 2018 and Enterprise Solutions 18.0 link to know what software and hardware needed to run the system.
Let me know if there's anything else you need with QuickBooks. I always got your back.