Yes, you are right. Sorry. Actually the button -> Temporal Ranges has another meaning, see page 90, Reference Manual of BlueKenue.
Ok, another try
which hopefully works but seems to be a little bit complicated
Use the calculator:
for scalar values: select the variable, specify the start and end frames, the expression is simply A, calculate and save.
for vectors: extract separately both the U and V components in the desired range, and then under Tools -> Create Vector Field you can create from the scalars again a vector mesh.
Hope this helps.
Clemens