Installed without error on my Win10 x64HP latest ver 1909. However, there is no sign of the application after I restart my Excel 2013 I tried both the .msi and .exe setup files; neither successfully installed the software. THIRD TIME was the charm! Ran the FlowBreeze5AdminSetup as Administrator, and FINALLY FlowBreeze showed up on the top ribbon as a Trial. Went to the Help tab, Register, and after two tries was able to successfully cut and past the registration key, which was accepted. After relaunching Excel 2013, everything looks perfect. I suggest the developer add some of these clues and tips to their web page. Hope my feedback is useful to others! THANKS for the opportunity to use and explore this software!