Issues with Opening Thumbnails in Sikuli IDE

The issue I'm having is pretty simple. Essentially, I have many screenshots included in a script (used to automate testing on a UI), and up until now the thumbnails of these screenshots have been very interactive. If I clicked on a screenshot, I could set a target offset as well as set a percent required for matching the image to images seen on the software I was testing. However, when I tried to continue my test script today, I was no longer able to click on a thumbnail in the script to open the window with the options. Instead, when I click on a thumbnail, the IDE window closes, then opens with a white screen, then loads back to the script, ultimately never coming close to opening the window desired. How can I fix this issue so I can continue to employ the offset and percent matching options efficiently?