If you’re afraid of the Linux transition because of your loved Windows-only app, your fears are greatly reduced with Wine.
Wine is a compatibility layer that will allow you to run and install Windows programs. A huge list of softwares has been tested to run with Wine pretty successfully. Specially now, that after 15 years in the making it has achieved its milestone 1.0 release. A large help was provided by the support received from Google to speed this development.
You can easily find Wine on your Linux distro repositories or download it here. One of the essential tools for a Linux convert.