If you forgot your hotkey combination, the simplest way to get into the program again is to re-run the setup file which will reset the stealth flag but keep the rest of the settings intact.
Make sure you have the “Start recording in selected mode” option enabled. If you are running Snooper Pro as a service this setting should almost always be checked unless you are using the built-in scheduler of Snooper.
In the mail settings use port 587. In the Advanced settings TLS must be enabled and SMTP authentication checked. User Id and Password must be filled in.
Enable AGC (File/Options/Audio/Input level amplifier) and set the level to 50-60 dB.
Use a filter (High Pass – 200 Hz) in the advanced filter settings dialog to dampen low frequency noise and hum.
The trigger sensitivity (front GUI) is typical a value between 0-200 ms.
Record a noise profile (the blue button at the front GUI).
Check the “Only on trigger” if you want to record the sound without filtering and only use the filter when triggering, by using this option it is possible to filter harder during trigger without affecting recording quality.