It's a false positive generated by the heuristics of WD and MSE following a recent update to their Definitions.
Some have had success in reverting to 4.0.14 until this is resolved, but while 4.0.15 is perfectly safe, if an AV program is kicking it out then if you need to run the program, you can do so but it would mean downloading and running it in Safe Mode with Networking each time or just using 4.0.14.
I don't know why this affects 4.0.15 and not 4.0.14.
From a post submitted by jpm, I understand that either he or Shane will be taking this up with MS but as to when it will be resolved, I don't know.
You can download earlier versions of WR by clicking on the links on the right from
https://filehippo.com/download_tweaking-com-windows-repair/