FEFLOW EDU time series error

Version of FEFLOW: FEFLOW 7.0 (update 10) March  2017, version edu,
In 3D flow model, assignment of  time series for Multilayers well in multilayers well editor work  OK.
However when  we add  the heat transport problem and after that we want to add time series for multilayer well in multilayer well editor is impossible to right-click and switch to time series, the option for time series is not avaliable.
Thank you for any suggestion

I tried to reproduce your observation. I used a fem-file and tried to assign a time-series to the MLW in the MLW Editor. Before I clicked on assign, I assured to have an active Edge selection of the MLW. Please try to use the MLW Editor and assure you have an active Edge selection (no Join-Edge).