No problem.
As you aware of this setup_5.5.35.0.exe is, e.g. is this something you downloaded (Alienware command center).
As this was something intentional, a program you had downloaded or an update, etc. then there is a little less concern. As this is (or appears to be) the case the Detection is by the Behavior Shield, it is more of what the installation wants to do might be considered suspect.
I'm not familiar with the Avast One program version, but it should be similar to the Avast Antivirus Free that I'm using.
If you choose the Move to Quarantine option and it is in there. You could open the Quarantine and select Send for analysis and give a brief description of the problem. A link to this topic would help give more information than you could input on the submission.
If you didn't send it to Quarantine:
Then you can use the - Reporting a Possible False Positive File or Website -
https://www.avast.com/false-positive-file-form.php.
You should get a response in a day or two.
Same drill here give a link back to this topic as it contains a lot of information that should help.