Thanks for the update Ken - glad to hear you got it working.
LogViewPlus sets all DPI related display settings at startup. In this case, it sounds like the display settings may have been changed after LogViewPlus was started. The issue could then be resolved by changing the windows settings back to the baseline or restarting LogViewPlus.
Ideally, LogViewPlus should adapt to these changes automatically. This is something we can look into.