Further to last post and heeding of comments I again un/re-installed v3.110.
Subsequently able to open and used seven times - thought problem solved . Just tried to open again and flagged message displayed.
I use a Evesham 510 (beleive ASUS base) with 1024mem XPro 80gb HDD (where Hoster and its database is located) and a swapable 80GB HDD (where I have my main store of mp3/cdg files)
I do not conduct Karaoke shows - I am a singer with memory/dislexia and use system as an aid when I sing - either as teleprompter or to produce compilation discs to use with my tablet dvd player.
In the past system has worked whether or not removeable HDD was present and regardless of being connected to internet.
An further thoughts/experience
Ivor