sorry, didn`t recognized the real problem

surely it`s possible
log in, go to Products - Rack Extensions - press download of whatever you want to delete and then it appears a window on the left where you can delete this, and if needed, reinstall

i have to be online for a lot of my new purchases, not these trials
so i wouldn`t buy anything more at all
e.g. these 9 Euro things from Skrock Music, except Nautilus, the Rob Papen things and a lot more

better to spend money in vst`s