Images don't sound too big. Maybe your Flash browser plug-in isn't up to date? There was a change from Flash 9 to Flash 11.
Bing maps work fine under an English working Windows environment. Problems happen when "commas", are use instead of "decimal point". in GPS co-ords, this is something we have covered before on the forum.
Showing screen captures may help!
There shouldn't be any difference between trial or full version other than watermark or trial splash screen appearing.