Gigapixel not closing when returning to LR

Ever since the latest version 5.3.2 when I invoke via LR it does not close the window when returning. This means the next time you invoke it, you get your left over image in the batch processing selection window which gets a bit confusing. Best to just have it cleanly close down thanks. I’m doing this on a PC Win 10 with LR Classic version 10.1