PureRaw4 and Lightroom: how to access the lightbox?

I’m evaluating PureRaw4 as a Lightroom plugin.
When using the “Instant processing with DxO PureRAW” it works fine, my last setting are recalled, no issue.

But when using the “Preview and process with DxO PureRAW” I don’t know how to access the Lightbox to make adjustments to several pictures at once.
And the default settings are always recalled, so it takes a lot of time to modify all I want.

Is there anyway to do it properly or should I use only the instant processing, grouping pictures for which I want the same settings?