Normally, uninstalling both G-Wizard and Adobe AIR by moving them to the trash will do the trick. Note that if there was ever an install even on a removable drive, you apparently need to remount the drive and uninstall there too.
Adobe's AIR Troubleshooting page has a number of helpful tips:
https://helpx.adobe.com/air/kb/troubleshoot-air-installation-mac-os.html
If none of that helps, try these two:
If you get it installed, and it appears to start but won't actually open a window, try running the application once from the Terminal window. This has been a problem on Sierra, and we're looking to fix it, but running it once via the Terminal window appears to heal the problem.
I did have one customer report the following:
I did a total uninstall of both GWizard and GWizardE as well as Adobe AIR Installer.
When I tried to install GWizard, it claimed it needed a version unavailable for my system. I then had to go to the Adobe site and download and install the AIR installer. When I attempted to then install GWizard, AIR would install the application and attempt to launch it. At that point, the application would launch and immediately quit and nothing I did would get it to launch properly. I ran into the "Cannot open this app because it's from an unidentified developer" dialog, and dismissed it. I know how to authorize one of these applications (use the control key while opening the application, then allow it), but it still quit immediately after launching.
I then did a total uninstall again, including AIR installer, and started over. I recalled an article in OS Daily about re-enabling the "Allow unidentified developer" setting in the security settings, which requires a terminal command. After issuing that command and re-attempting the install, it finally worked. Apparently, the initial launch by AIR after installation is a required step or the application will never launch correctly.
Here is a link to the article in OS Daily that is referred to.