Here you can download the last version of the toolbox. USTB is citationware, please have a look at the citation policy before downloading the toolbox.
The best way to keep USTB updated is to clone the git repository from:
|USTB git repository
Alternatively you can download the current version of the toolbox with the link below
In both cases remember to add the ustb repository (without subfolders) into MATLAB’s path.