Purchase of LightFactory entitles you to free upgrades within minor version changes or for 90 days from the date of purchase. If the major version number has not changed you are still entitled to free upgrades regardless of when the software was purchased. If the major version number has changed then you are entitled to upgrade for free if the purchase date is less than 90 days ago. Thereafter upgrades to a major new version are available at a discount to existing customers.
The major version number is the first number in the set of four (4). i.e. In the version number 2.6.167 the major version number is 2.
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