Hi.
Gigapixel versions 7 & 8 are built on a different updated AI engine then, previous versions therefore, the recommended strategy is to uninstall one before installing the other.
Your Asked
If you Download and Install Gigapixel 8 it will indeed overwrite version 6 and Gigapixel 6.0.0 will be deleted. If you want it back you’ll have to Download the application form the Topaz Community Release page and Reinstall it again however, as I’ve already said it’s recommended to remove one before installing the other.
Here’s the links to download and Gigapixel 6.0.0 for both Windows and Mac
NO. You can’t have two versions of Gigapixel AI on one computer at the same time unless, you own Photo AI which has Gigapixel functionality built-in.
As I have already mentioned you have to uninstall version 6 first then install version 8.
Here’s the Topaz Trial Mode information for your convenience
Trial Mode
Explore the potential enhancements that you can make with Gigapixel through a free trial.
The free trial mode allows you to use all the features of Gigapixel with the exception of saving your enhanced image.
You must purchase a license in order to save your images. Please review license pricing here.

Learn how to use the trial mode for Gigapixel using these steps:
-
Click Create an account
-
Type an email and click Register.
-
Once registration is complete, proceed to your email and locate your Registration confirmation email.
This is a time-sensitive update so be sure to register as soon as you receive the email.
Click the link to Choose your password.
-
Follow the prompt to set up your password. Type in your password and then click Save Password. (You have the option to Login and review your Topaz Labs account using the Topaz Labs Account dashboard.)
-
Return back to Gigapixel and click Login. The Gigapixel application is now available for use. “Trial mode” in the top right corner indicates that you’ve started your free trial correctly.

Clicking “Export image” during trial mode, prompts you to purchase a license.

To continue using Trial mode, click the “X” button in the top right corner of the “Purchase a license pop up” message.
Once you have tried the trial version you need to decide if you prefer version 8 over version 6. If you want version 8 then, pay for the upgrade within the application or from your Account page on the Topaz website.
If on the other hand, you decide you want to continue using version 6 then, you’ll need to uninstall version 8 and reinstall version 6 again.
Here’s the links to download Gigapixel 6.0.0 for both Windows and Mac
Having said that, there are ways and means of having more than one version of Gigapixel AI on your computer but, how you go about that is entirely up to you to discover.
You can’t really expect to ask an employee working for Topaz to explain to you how to change, manipulate or reconfigure the software in such a way that will allow others to have more than instance of the same application on one computer at the same time it wouldn’t be ethical.
Hope this helps
















