When a tool throws an error and it tells you it needs Lib-1.2.3, it sets that as the minimum requirement, so Lib-1.1.1 will not do, BUT the the only available version is newer, like Lib-1.2.8, then it should still work It'd be better if it were to say it needs 'Lib-1.2.3 or higher'... So don't worry too much about that side of thing...

I am keeping all plugins in the 'plugins' folder and not in any other folder of my choice. So deleted 000_AdditionalPluginFolders as you advised. The error messages are gone! Thanks.