There are two versions of BC Calc® software: Web BC Calc and Web BC Calc Offline Mode.
Here is a web site with links to recorded webinars:
BC Calc Web
This version can be used on Windows or Apple operating systems via Microsoft Edge, Chrome, Firefox or Safari browsers. Additionally, iOS and Android tablets are now supported. (Internet Explorer is not supported.)
BC Calc Web Offline Mode (Microsoft Windows only)
Registered user may click their user name in the top right and select Offline Mode. Follow these instructions for install. Offline mode runs in a web browser but does not require an internet connection. https://p.widencdn.net/wbl8xk/BC-Calc-Offline-Mode-Setup