Sometimes I'm downloading one file from two servers, and one server finishes sooner that the other, I click Pause button on the server, that was slower or hasnt even start yet.
But when I click on the Pause, it deletes the finnished file that the other server downloaded .

Is this your problem?
[bugtracker.wordrider.net]
(this one was fixed for upcoming 0.82).

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yes. thank you