Malae on "[Plugin: Wordfence Security] File difference warning, but no difference."

Hi Mark,
Further to my post above, I have another issue. Wordfence is reporting that my updraft.php version 1.8.5 is differing from the original version. However, it shows the original version as 1.8.6, which is a development version not yet available though the regular WordPress updating process. Can you explain how and why Wordfence finds this newer version.