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Windows

Window options

Open private messages in their own window
If you disable this option, a private message from a user appears as a status line in main chat instead of in a separate window. This could cause you to miss some messages if you don't check the chat regularly. You may not care much for private messages from other users. Ignoring them however, not only lessens the (user-friendly) Direct Connect experience, but is not always wise because failing to reply to a message from an Operator can get you kicked or, in the worst case, permanently banned from that hub.
Open private messages from bots in their own window
Enable this if you want messages from hub bots in their own window. When disabled they get sent as a status message in main chat instead which is less annoying yet still informative. This option only matters if you're not ignoring private messages from bots.
Open private messages from the hub in their own window
Enable this if you want messages from the hub in their own window. When disabled they get sent as a status message in main chat instead which is less annoying yet still informative. This option only matters if you're not ignoring private messages from hubs.
Open new file list windows in the background
Keep this disabled if you want newly downloaded file lists to pop up in front of other windows. It can be very annoying to have a new window pop up when you're typing something.
Open new private message windows in the background
Keep this disabled if you want new private messages file lists to pop up in front of other windows.
Open new window when using /join
When using /join <ip>, a new window with the hub will open.
Ignore private messages from the hub
Enable this if you wish to ignore private messages from the hub. However, these messages generally contain useful information, like hub specific rules or warnings.
Ignore private messages from bots
Enable this if you wish to ignore private messages from bots. However, these messages generally contain useful information, like hub specific rules or warnings.
Toggle window when selecting an active tab
With this option enabled, clicking on an active tab will mimic the behavior of Windows 98+ and send the currently active window to the background. The most recently accessed window will become the new active window.
Popup box to input password for hubs
When being prompted for a password in a hub, you will with this option enabled have a box popup and will allow you to enter your password. With this option disabled, you will be prompted with a "/password" instead.

Confirm dialog options

Confirm application exit
Enabling this option will cause DC++ to prompt you before exiting.
Confirm hub closing
Enabling this option will cause DC++ to prompt before you close a hub window.
Confirm favorite hub removal
Enabling this option will cause DC++ to prompt before you remove a favorite hub.
Confirm favorite user removal
Enabling this option will cause DC++ to prompt before you remove a favorite user.
Confirm item removal in download queue
Enabling this option will cause DC++ to prompt before you remove a file (or files) from the download queue.
Confirm ADL Search removal
Enabling this option will cause DC++ to prompt before you remove an ADL Search item from the ADL Search window.