EA files get deleted



I came across a weird problem I have never had before:

I am trying to install an EA and when I paste the ex4 file into the expert folder it disappears as soon as I reopen the mt4 platform.

This is version #2, the original version does not disappear. When I give #2 the same name like the original, it gets deleted, too

Does anyone know this problem and how to solve it?

Thank you in advance


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