Check that the plugin is looking for the samples in the right location. You can do this in the Engine tab of the plugin’s settings screen. If the location is wrong you can redirect the plugin by clicking the Change sample folder location button.
The first time you launched the plugin you should have been prompted to either install the samples or locate them on your system. If you chose to locate rather than install the plugin will not function correctly. You’ll need to remove the plugin’s configuration files, relaunch the plugin, and the prompt to install the samples will reappear.
Please refer to the installation guide for more details.
GUI is too big
You can choose to scale the GUI up or down in the Engine section of the settings screen.
If you find a situation that triggers hanging notes there is probably a sneaky bug in the script which I have missed. Legato scripting is the place where such bugs are often found hiding and I would not be surprised if some edge cases bring them to the surface.
Please create a MIDI file, as short and simple as possible, that consistently triggers the hanging notes. Send this to me attached to a support ticket along with other useful information such as the name of the plugin, the plugin version, the DAW you’re using, your operating system, the OS version, if possible a small mp3 file that demonstrates the issue, and anything else you think is relevant.