Include a copy of the FMP trial installer, job done.
Runtime has too many missing features.
Well...that might be an option, although we are trying to avoid having to make them install other software. (A bit odd, I suppose, since if they like the demo they would have to install the full software anyway.) And with issues around PDF generation in runtimes also...that makes for a stronger argument to install the full client.
I retried changing registry with FMP15, but no sccess. Runtime doesn't support script and param parameters in fmp URL.
Only disadvantage of installing trial version may be limit of 30 days.
Thanks for looking into that. Yes, the trial version might be the solution.