Bug: Crash when do search in Logos 4 Help

Summary
I typed in “Zoom” or any text in Logo4 Help search text box, and click the ‘search’ arrow button; then the Logo4 crash and close (after Update of Logos4 Help file)

Software version: 4.0 SR-7.
Reported by Maniel.
Forum link: https://logos.vanillacommunities.com/forums/p/7279/57659.aspx#57659
Status: fixed in 4.0a