There is a way to check if any of the plugins are not compatible with your current wordpress install. Just go search for the installed plugins ( make a search like if you want to install a new one ) and then you’ll see some description saying if it is compatible or not.
On the other hand. You’d better use a child theme ( of the Nirvana theme ) to avoid problems during updates. Because wordpress is actually replacing the old files with the updated ones. So, all the changes you’d made in old ones will be lost.
