There is a possibility that index-files can be corrupted. This happens for example if the powerline from your computer fails during any database-operation. To get everything back to normality we included a hidden function in WINQSL. If you press the keys ALT+CTRL+R at the same time a window with a button opens. Just press this reorganize-button and sit back. The procedure will take several minutes. All index-files will be removed and totally rebuild. After this procedure everything should work again absolutely normal.