Try out changes your cheatengine.exe to another name.
Also, most of the times they detect titles of applications running, so if an application is called cheat engine (even with chrome browsers open that have the name in it) it wont start up.
There are several programs that can change titles of currently running apps.
If all that doesnt work, get the FUD cheat engine.
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it probably exists, i just dont have the right experience to accomplish that.