Cheat Engine is installed on this machine, however it was not running at the time of the scan (afaik), and hasn't been run since April. I'm also unable to reliably reproduce the detection with a threat scan, custom scan (with all scan options enabled) or scan triggered using the shell extension, however this is not the first time this specific detection has happened for me on a scheduled scan (see attached log from last week).
I've also found another erroneous PUP.Optional.BundleInstaller detection in my history which I cannot reproduce, which I've also attached.
detection-20210824.txt
altdetection-20210814.txt
dnscrypt-proxy-win64-2.0.29-beta.1.zip.zip