After fixing security issues, MainWP Dashboard offers you to reverse the fixing process and to unfix issues any time you like. To unfix issues, go to: MainWP Dashboard > Sites > Manage tab and under the URL column click on the Security Scan link and locate the Unfix link:
If the WordPress Version, RSD (Really Simple Discovery) meta tag, and the Windows Live Writer meta tag issues are fixed (removed) by using some other plugin, MainWP Dashboard will detect issues as fixed, but you will not be able to use the Unfix function. The Unfix function is able to undo the fix only if the fix is made by MainWP Dashboard.
