If the issue is that the windows won't open, then you need new operators. Your photo doesn't tell me much, though, it only shows the base and handle. In order to recommend a new operator entirely, I need to see the original out of the window.
No, I'm afraid not. We need to see the entire assembly, including the link arm(s) that push and pull the window closed. A bird's eye view is typically best. From there I should be able to fully identify the operator.