How can I restore missing columns in list windows of DC++?
- column size
It can happen that one or more columns or even the whole column set resized to zero in those windows where lists appear (like userlist, search results, transfers, favorites, etc...). There's an easy solution to reset them to a visible size : click on the list window and press Ctrl and + (plus) key in the NUMPAD. To access this key combination on a notebook keyboard you probably need to use the Fn key as well. This should solve your problem.
When for some reason Ctrl + can't help, you can manually edit or (as last resort) remove the DC++ settings file. All the settings including the column widths of list windows are stored in the DCPlusPlus.xml in your DC++ folder. You can open this file with a text editor after you closed DC++. However, manually editing the file is your responsibility so do it only if you know what you are doing! Improper editing or deleting this file could result loss of (all) settings...