Additional to previous advice ... when purchasing software [download or licence] take screen shots and save images for at least 12 months. It is easy to forget a virtual purchase as there is no physical object, or delivery event, to trigger that purchase-memory. Also, when buying a licence check it is a full licence, fully compatible, updatable and unconditional e.g. not a time-limited demo. (MS Screen shot shortcut - at same time press ALT & Print Screen - image now in clipboard ready to paste)
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