Force Resume Button: If a Download is in the state of 'couldn't download' it will resume -- try to reconnect to a/the host and try to resume.
When a DL is at 0kbps it will not help pressing it. if a DL is waiting or retrying it will not help pressing it.
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a slot can not be claimed by an other noad if in use by another.
how long a slot stays yours depends on the last communication between you and the other noad. if you canceled/killed your DL it will use the slot for someone else. if you had a 0kbps you're still connected.


mahalo