Not quite the answer you are looking for, but it is possible to open the .rbl recordings with Notepad and just copy/paste/delete to get the bit you are interested in. You can even search in Notepad to help you find the aircraft.
The time format is:
YYYYMMDDHHMMSS - and a few more fractions of a second I guess
$PTA,20080208192827447,400B04,,24000,,,,,,,,
$PTA,20080208192827447,40098F,,19450,,,,,,,,
$PTA,20080208192827447,40100A,,21575,,,,,,,,
$PTA,20080208192827463,4008F1,,19025,392.6,148.0,64,,,,,
$PTA,20080208192827463,4CA2F5,,16000,,,,,,,,
$PTA,20080208192827463,4CA621,,29000,,,,,51.2818,-4.8929,,
$PTA,20080208192827463,400E06,,13725,,,,,,,,
$PTA,20080208192827463,40055F,,37000,,,,,,,,
$PTA,20080208192827463,400E07,,13725,,,,,,,5031,
$PTA,20080208192827463,400536,,33000,452.0,3.8,0,,51.7453,-3.2540,,
$PTA,20080208192827479,400536,,33000,,,,,51.7476,-3.2538,,
$PTA,20080208192827479,40127A,,27025,,,,,,,5057,
$PTA,20080208192827479,760942,,9000,,,,,,,,
$PTA,20080208192827479,4CA63A,,19975,,,,,53.2332,-2.6684,7621,
$PTA,20080208192827479,4CA63A,EIN27V,19975,418.0,337.8,0,,53.2346,-2.6694,,
$PTA,20080208192827494,4CA19A,,10150,357.1,127.8,-384,,52.8923,-2.4856,,
$PTA,20080208192827494,4CA19A,RYR666,10150,355.6,127.8,-384,,52.8911,-2.4830,,