
To upgrade to Astro IIDC 4, you need the following three items:
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Internet access with a valid e-mail address,
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an electronic means of payment (i.e. credit card, debit card, PayPal etc.) and
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the Unlock key(s) that you received by e-mail from us when you purchased Astro IIDC 1.0, 2.0 or 3.0. It will be a 32 character key like:
4736E7FF4B0AF02F62BC1BCDFF956D59
Once you have those items, complete the following steps:
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Go to our Secure Kagi Hosted Store web site.
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Once you reach the web site, scroll down the page until you see the following entry form.

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In the "Ordering Custom Products Item:" field, enter the phrase "Astro IIDC 4 Upgrade".
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If you are upgrading from Version 1.0 or 2.0, then the upgrade cost is $60.00 USD per copy. If your upgrading from Version 3.0, then the upgrade cost is $35.00 per copy. In the "Price" field, enter the total amount for what you are upgrading.
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In the "Enter Serial Numbers to Register:" field, copy and paste the previous unlock key(s).
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Your completed form should look something like the example below. This shows what the form would look like for someone upgrading three copies, one copy of version 2.0 ($60) and two copies of version 3.0 ($70) for a total of $130.

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Scroll down to the very bottom of the web site, click on the "Continue" button and fill in the payment information.
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You are done and your new unlock key will be e-mailed back to you shortly.