[Help needed with Flaming Pear Flood filter]

Oh dear.  Flood 2 I suppose.  I'll see if I can get Flood if that does work.  Thank you so much!

[Help needed with Flaming Pear Flood filter]

Can anyone help me with using the Flood filter from Flaming Pear?  I am using Windows 10.  When I call it up from Affinity Photo (which I am very new to) the PlugIn opens fine but nothing in the filter is operable (except rolling the die ).  I tried to use the Marquee tool on my background layer before sending to this plugin but then the image that opens in the filter is a semi transparent image (and none of the tools in the filter worked). Without the Marquee tool the filter opened but no image.  Help!

[Running Flaming Pear Plugins in Affinity Photo]

I realize this is an older post but I'm new to Affinity Photo and would like to use Flood filter from Flaming Pear.  I used the Marquee too and called up the Flood filter but my image was semi transparent and the tools in Flood were not operable.  Any ideas?  I'm on Windows machine.  Thank you!