EDIT
Thanks. Image folder empty. Token folder has one file - 237 K.
I've started the campaign and assume it cleaned out the image records as described above. FGU still took ~1m30s to open the campaign while the task manager showed the Memory building to 1,230,000 K before the campaign was accessible. I have it open now and getting small lag on other applications (e.g., as I type this in the forum). We'll see how tomorrow's game goes!