@IronTechmonkeyThat is consistent with what I mentioned the FAQ but also perhaps more importantlyu this...
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That is a very old version of MiX; which might be the reasons it is raising red flags with Google protect. The current version of MiX is MiXplorer_v6.64.3_B23090710.apk, link to file at GDrive in post 2 of this thread.
If for some reason you must run the older version then you could try temporarily disabling Google play protect like so: Playstore > menu (your account avatar at upper right) > Play Protect > Gear icon > turn off Play Protect and Harmful App Detection.
can u post direct link for:
MiXplorer_v6.64.3_B23090710.apk
plz