I'm a long time lurker on this sight. I have been using the last version of MTC that was compatible with the machine that shall not be named. Today I am getting an error message that I have to upgrade to a newer version. This is happening on files I cteated in MTC. I know I can't use the new MTC files because I am no longer updating, but I don't understand why I can't open files I created. This error does not occur on all my files. For example there is a card I created in 2012 that gives me an error, but I can open the Christmas card I created in 2015. I am not sure why it is happening. Any help would be greatly appreciated.