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Topics - daniel12997

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TI Calculators / Downgrade Ti-nspire OS From 3.6 to 3.1 for ndless
« on: February 21, 2014, 08:07:04 am »
I got a Ti-nspire and "Upgraded" to the latest OS accidentally . I then tried installing a previous version and it gave me the error: "The Operating system file is corrupt or invalid. Please go to education.ti.com to get a new OS file." I am wanting to install ndless to play games. I am willing to do a little coding if that will fix it.

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