Welcome to the Guild!
If you want to keep the CC2 symbols, you will have a bit of work ahead of you. You will need to make a 'map' using ALL the symbols, then save that as a PNG (or JPEG, don't remember if CC2 allowed PNG or not). THEN you will need to clean them up in photoshop, erasing the back ground etc to make a new 'symbol catalog'.
Or you could just upgrade to CC3 where all the symbols are already high quality PNGs