How to remove plugins from ignore list


I have troubles adding downloaded plugins into my WaveLab 9 LE (64 bit).

You can see my settings on the attached picture.
However there are no ignore rules, still the plugins from imported folder are ignored and I can also see them in ignore list. I have tried to change folder containing plugins, force plugins loading and also looked into AppData\Roaming\Steinberg\WaveLab Elements 9 settings if there are some hidden ignore rules, but unsuccessfully.

Thanks in advance for any help.