Question: Numbers on High Sierra Migration Woes!
Brand new iMac running High Sierra 13.3.3 and Numbers 4.3.1 . . . tried to update Numbers document from earlier version (Snow Leopard?) and find that the new document cannot be edited once saved, and the URL's are completely dead. They were live during the editing process! How do I regain editing ability and live URL's on my newly edited spreadsheet, or must I enter everything from scratch in the new Numbers? What a colossal mistake in upgrading!