The download link in the Trial Account Information is unique to you and provides the installation files relevant to the BayesiaLab version you licensed.
Once you open this link in a browser, you will see several BayesiaLab versions available for download:
BayesiaLabXX_JRE_32.exe: Installation files for Windows 32-bit systems, including the Java Runtime Environment.
BayesiaLabXX_JRE_64.exe: Installation files for Windows 64-bit systems, including the Java Runtime Environment.
BayesiaLabXX.zip: Universal installation files without Java Runtime Environment, suitable for all operating systems, including Unix/Linux.
BayesiaLabXX.pkg.zip: Installation files for macOS/OS X.