It’s late response here, Hope you already reached to our pro helpdesk and got a proper support on this. As, We have helped all users all possible ways during that tough time.
We have released patch of pro version within a few hours, Which you can download from our store. Our Free version wasn’t vulnerable nor infected. If you want a patch for old version, You need to get in touch with our helpdesk.
You can even check wordfence’s Update of that issue : https://www.wordfence.com/blog/2021/03/critical-0-day-in-the-plus-addons-for-elementor-allows-site-takeover/
We have released several bug fix releases and increased security by using multiple security experts.
We are making this ticket as resolved, Still, If you need any help, You may reopen this or submit new ticket. We are always happy to help you.