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Check version change eligibility

Introduction​

You may need to change Epsilon's version to unlock your calculator, we usually install Epsilon 18.2.0. There are some cases where you can install Epsilon 18.2.0 and some where you can't. This page explains how to know if you are eligible or not.

If you have Epsilon 15 or lower​

You don't need to change your version, just go to Now What ?

If you have Epsilon 16 to 18.2.0 (but not 16.4.3)​

You don't need to change your version, just go to Phi.

If you have Epsilon 16.4.3 or 18.2.3​

You are eligible, you can continue normally.

If you have Epsilon 19 or higher​

It depends on the version you had before updating to Epsilon 19 and higher.

  • If you had 15 or lower, or any OS other than Epsilon: You can't change your version.
  • If you had 16 to 18.2.3 (but not 16.4.3): You can change your version.
  • If you had 16.4.3, 19 or higher: You can't change your version.

And if you don't know​

Don't worry, trying to change your version won't break your calculator. If you are not eligible, after the process, the calculator will be stuck on the NumWorks recovery screen and you will be able to update from NumWorks' website and your calculator will work normally.

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If you are not eligible, you need to use an Alternate Method.