Unable to launch InstallShield2020
For some reasons, I had to initiate a repair on my InstallShield 2020. Then I launched the InstallShield and it prompted to enter my Activation key and after that it gave the prompt message stating "Activation Complete!" but then nothing happens as the InstallShield is not opening at all. I tried launching it again but it brings up the prompt to enter the activation code again and still the same. I have uninstalled it together by removing the leftovers of files and registries but to no avail. Kindly assists.