Longer-term I would, as Acorn suggested, look to move your website to a hosting provider that supports SSL (where the http://domain_name becomes https://domain-name). You have ( I think you said) another website with IONOS (which is also my host provider); this could be a future option that includes SSL - my websites are hosted with IONOS without any issues.
You would need to choose a new domain name (as Acorn suggested), register it with IONOS and publish your website to its new home. You would also create a permanent redirect from the Magix domain name to the new domain name to ensure all visitors are auto-redirected to your new host.
You could also consider upgrading to the latest version of Web Designer Plus https://www.xara.com/welcome/ which is direct from Xara.
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