Forums mIRC Help v7.1 and View Logs

This evening I upgraded from mIRC v6.35 to v7.1. I'm delighted by the new Unicode superpowers, but my View Logs dialog unexpectedly disappeared after I upgraded. When I click the View Logs icon or select View Logs from the Tools menu, Windows Explorer opens the folder containing my log files. A clean install of v6.35 restores the View Logs dialog, but a clean install of v7.1 continues to open the folder instead of the dialog. I'm running Windows 7, and I've never had this problem before now. Any advice or suggestions would be appreciated. I'm mystified.