1) All plugins files you can find in the toolbar folder. To find toolbar folder unlock taskbar (for XP only), right-click the toolbar separator and select Open from menu. All settings and all plugins are in the opened folder. You can backup all files or some of them. Files with *.tlbplugin extension as plugins (they have the TLB logo icon).
2) You can drag any plugin off toolbar into any folder or desktop. Click command line (somewhere not in edit line) and drag it on desktop. Hold down CTRL key when dragging. And when you release the mouse button you will see the plugin file. This file contain all setings from original command line. If you copy this file back to the True Launch Bar you'll get the same command line.
I hope this helps. Please feel free to get in touch with me, should you need any clarifications or any assistance. I would be happy to be of assistance.