I am having problems saving a document in Designer 2. I partially created a document (A4 poster), and saved it with no problem. I then carried on working on it, and the program now refuses to save it. I had to Force-Quit in order to do anything. I reloaded the same document from the previous save, carried out the same work, and again the program hung when I tried to save. Again, I had to Force Quit to get out of the program. I then tried a new document with some random shapes. It saved. I added some text, and it saved. I returned to the original document, carried out a tiny edit (moved a graphic item), and the program hung on save. Screen-shot attached. Annoyingly, I need the document, so I may have to recreate it now in a different program (probably two programs!).
Computer, iMac Pro:
macOS Monterey
Version 12.6.1
iMac (Retina 4K, 21.5-inch, 2017)
Processor 36 GH7 Quad-Core Intel Core i7
Memory 16 GB 2400 MHz DDR4
Startup Disk Macintosh HD
Graphics Radeon Pro 560 4 GB