I don't often use the Evernote spell-check. But out of curiousity I just mistyped a whole bunch of words in a note. Those incorrectly spelt were underlined in red. Each and every time I could right click and select the correct word from the supplied list with a left click. Worked first time, every time.
So I'm sorry that @rosingm has this issue which is clearly not correct. But it seems that it isn't a bug for everyone which, of course, makes it much harder to diagnose and fix. No comfort, I know. All you can do is try another full uninstall with an application such as Revo Uninstaller and then reinstall and start from scratch with the latest version of Evernote 10.49.4