[SOLVED] I2C LCD - Setup instructions for 16x2

Thanks for these clear instructions, I am sure they will help, but I afraid that I have got stuck on the first step "Rename the existing library" (or words to that effect).

After years using a PC I am sure that I could do it there, but not on my newish iMac!

If I rename the folders there, the IDE still picks up the old library. Any ideas anyone?

Thanks in advance