We are currently running version 2.2.4 and desperately need to upgrade to the latest version. We had a new admin account appear within our Magento so we suspect there are a number of vulnerabilities within this version.
Our theme does not support the latest version so we’ll need to install a new theme also. Can someone please advise the best steps to do this upgrade and avoid any downtime or data loss?
Would installing just a fresh copy of the latest version be best, install the plugins and new theme then copy over the SQL database? Is that even possible? Would errors occur as there will be tables within the database looking for the old theme?
Sorry, in a bit of a pickle and need to start outlining the best and fastest way forward.