Using PHsPeed manager version 8.0.A, change the Xampp (Apache) port has no effect.
I changed it to "8026", closed PHsPeed and open it again, checked it in the screen and saw the new port value, but the httpd.conf in c:\phspeed\xampp\apache\conf, is not changed, it's still in the original "8016" value.
Added it to the bugtracker. Can you change the port in tools->preferences?
We have found the issue, and it will be fixed in the next release. The original port is not removed, the new port is added to the listen list which is not good. But needs fixing anyhow. See https://www.phspeed.com/bt/index.php?do=details&task_id=400