MediaCoder

According to the features of "Mediacoder Premium" shown in "Solutions" page in mediacoder site,
there is
" Unlimited number of batch processing tasks
(freeware version limited to 50 queued files)".
However, at recent versions, free version can treat only 1 qued files with the interruption of "calculator puzzle".
(Exceptionally, when files are very short(about 60seconds), mediacoder can process upto 3 queued files)

When I purchased Premium version, can I treate unlimeted files without encountering "calculator pazzle" ?

The freeware version full capabilities can be unlocked with a US$25 donation (i.e. no calculation problem). For home use, there isn't much reason to buy the Premium version.

How long the effet of donation(avoid calculator puzzle) will be kept ?

It seems unlocking with a donation is a kind of licence.
If I unlock with donation, and after that I uninstall the mediacoder to introduce a new version,
should I donate again on the new version to unlock ?
And in another cases, when my PC become mul-functioned, then purchasing a new PC,
shoud I donate again to unlock newly-installed mediacoder on the new PC ?

Can you explain precisely about the scheme of unlocking by the donation.

The ID/license you are given is lifetime. If you re-install MediaCoder anywhere (upgrade or on a new computer), all you need to do is open MediaCoder, then up on the menu bar, open "Support" > "Get Mediacoder ID" then enter your ID again.
The only limitation with the ID is, never have two MediaCoder instances running with the same ID or the server will think you've shared your ID/license and will thus deactivate it.

HuggiL ！
　Thank you for useful information.

HuggiL: I suggest you update the Guide on this Topic at viewtopic.php?f=17&t=12453.
Also, update any of the other Guides you find in need of a tidy up, etc. Then, all you need do is refer people to the appropriate Guide.

Before I began the Tips & Guides I was repeatedly answering the same question quite often and had to type in the same sort of detail each time.
As I began setting up the Guides I got fewer and fewer queries.

Thanks HuggiL!