I can't get my installed program to open.
I had not opened Rosetta Stone in at least a year. During that time I upgraded my OS to Sierra. Now when I try to open the program I receive a message indicating an error. During that same period I changed my email address from *********@ sympatico.ca to *********@ cogeco.ca and I fear I have forgotten my password. Please advise me how to open and use the program.
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MacBook Air, macOS Sierra (10.12.5)