I looked at both of your links. It's hard to make out but it looks like you have the Hollywood FX Basic version which is not going to give you the editing options that the Mega version will. Actually, you may not be able to do any editing at all.
Looking at the fx tree in the lower left corner, I only see Host Video1 and Host Video 2. There isn't a separate Flash frame.
Since it worked for you in S9 it's possible that your S11 version is corrupted. Below is a link to a copy of my BAS-Photo Shot. I renamed it to Photo Shot 2. It's a self-installing file and should go into the same folder as the current one.
BAS-Photo Shot 2
Download it, double-click on it to install it. It may not show up in the transitions album so you'll have to add the old transition to the timeline, then double-click it to get into the editor. From there you can change to this new transition and then exit back to the timeline.
Also, in looking at your video, it looks like you could do this effect without the transition. You're going from a video to a still shot of the last frame of the video. You could add just a blank white title that's a few frames long to simulate the flash. If, for some reason, the effect I sent you doesn't work, it's an option to consider.
Let me know how this works out for you.
Joe