Hi,
Every time I have acted with CL I received an email with various download links.
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I do not know how long these links is valid - have never needed extra downloads.
I do not know if CL's policy is a restricted download period or is that you must pay extra on the purchase to extend the period for the download option.
Other companies use at least this policy.
When I install purchased software and found that that works, I always take a backup of the downloaded on an external disk - precisely because many companies have restrictions in the download period.
As mentioned earlier, it is usually possible to retrieve data from an old PC even if the PC is broken down and will not start.
This I have even experienced a few times so unless you have deleted your downloaded installation files you should be able to restore them - hopefully.
One very important thing is of course that you still have your Product Key otherwise you have to if you bought from CL go to 'CyberLink Members Zone - Manage My Products "and see it there.
Good luck!
PDR 14.0.4207.0 / Windows 10 64-bit / Asus / Intel i7-4790 3.60 GHz / 16GB RAM / NVIDIA GeForce GTX 970 / DirectX 12