SRL Archive - OSR Help

I've been using Simba for a while without issues but I've run into a problem that I cannot solve.
I'm trying to use simba with a flash game (rotmg) and it just does not seem to be able to recognise the client. When I select flash as the client and take a screenshot it is completely black with a small white square in the bottom right corner. It cannot find any bitmaps on the flash client unless I make the area the entire screen.

Thanks

Flash clients do not have a DC and they blit to their parent DC which is why it works for the entire window area. Try using APPA?

It does actually work on my other computer. Just not this one.