When I open a one-click link, sometimes a new instances opens. But the first one ist still open and downloading... then they are blocking each other after a while.
How can I avoid this.
Is there a system-option, which blocks that (check if JD is already running... don't open another one...)?

Thx

Normally two instances of JD communitcate via a TCP/IP socket with eachother. Sometimes this does not work properly:

- Any Firewall is blocking the communication
Solution: Unblock JD in your firewall.

- Windows has been restarted from StandBy/ Hibernate
Solution: Close all JD instances and restart JD.

Originally Posted by gluewurm

Normally two instances of JD communitcate via a TCP/IP socket with eachother. Sometimes this does not work properly:

- Any Firewall is blocking the communication
Solution: Unblock JD in your firewall.

How can a firewall block JD and I still can download files?

[scr4ve]

Originally Posted by Winf2006

How can a firewall block JD and I still can download files?

JD opens a port locally to listen for new instances. If you firewall blocks this, you still can download, but your detection for new instances will fail.