The newer version of Radiance has some nice features that we make use of in the newer LBT plugin, though they are relatively advanced. I can’t remember all of them but a big one is that we can now run simulations with Weas at timesteps other than 1 (eg. every half hour).
Uninstalling and reinstalling Radiance should be pretty straightforward. More info on the differences in LBT 1.3 can be found here: