Either you've moved the files or folders you were sharing, or you've accidentally deactivated your sharing folders (which can be done by right-clicking & ...)

Go to LW's menu Tools>Options>Sharing & re-add those folders you were sharing before. Then press the apply button. You may or may not also need to go to the LW Library window & press Refresh button.

If you were sharing your LW dwnld folder then you may have moved those files away. That might be why you're now sharing less!