Hey Boxerananta,
Thanks for using Apple Support Communities! I understand you are running into an issue with multiple third-party apps not opening. I definitely want to make sure you're able to use all your apps without issue, and I'm happy to help.
I recommend checking out the resource below and working through the steps there to resolve issues with apps like you're describing.
If an app unexpectedly quits, stops responding, or won't open
If the behavior continues after that, reach out to the app developers for further support. You can see how to do that here: How to contact an app developer
Thanks again, and have a great day!