The reason for asking you to post the last preset (or if NTLite auto-saved a few of them), is it records what edits are made to the image. It's better than having a vague memory of what you may have updated. Good note taking is important, so you can learn what happens when making specific changes to the ISO.
If you don't get into the habit of keeping presets, it gets very hard to recreate a project from scratch.
The system tray (or notifications) can disappear if you removed notification components, or disable the Explorer / Display tray icons settings.