Well everyone use an AV and most MSE why don't you give at least correct indications how to avoid false detections?
I use olther 3 trainers of yours and MSE gives me no problem why SCL trainer has to do?
This is not their job. They are not employed by Microsoft. They do not develop MSE/Windows Defender. They don't know how that product works. They don't know what sets it off. You must open a support ticket with Microsoft as it is a defect with their product.
Well in my windows temp there is no Mnn133.tmp file. Never had problem with AV and CH trainers before, I think it would be simpler to build a trainer that doesn't affect MSE.
You might want to select in the options to show all hidden files, Windows likes to keep some files out of view.
Another quick note; when searching for a file you can merely type the file's name in the search window at the bottom of the Start menu and it will find the file, as long as it is not hidden.