A relative's computer had McAfee remove a 'trojan'
I am fairly sure that this is a false-positive.
Has anyone else encounered this & how can the damage to the extension be rectified?
This file has been whitelisted and it should no longer detects. As Artemis is updated in real-time there is no requirement to wait for a full DAT update nor to use an EXTRA.DAT intermediate solution. Simply wait approximately 30 minutes and this false will no longer exist or trigger on your system. Depending on the network settings you have or the caching involved between your system and ours it may take slightly longer for this false alarm to be resolved.