To test the download can be found here: https://bitbucket.org/coronablender/render_corona/downloads/?tab=branchesNote that you shouldn't probably shouldn't use this on any important work. You should be able to swap this in and out again I haven't had any issues with this but I can't absolutely guarantee that it won't break a .blend file :)
Traceback (most recent call last): File "C:\Users\309\AppData\Roaming\Blender Foundation\Blender\2.81\scripts\addons\corona3alpha\engine.py", line 620, in render render_start( self, depsgraph) File "C:\Users\309\AppData\Roaming\Blender Foundation\Blender\2.81\scripts\addons\corona3alpha\engine.py", line 180, in render_start render_scene( engine, depsgraph) File "C:\Users\309\AppData\Roaming\Blender Foundation\Blender\2.81\scripts\addons\corona3alpha\engine.py", line 479, in render_scene process = subprocess.Popen( cmd, cwd=export_path, shell=False, bufsize=1, universal_newlines=True, **args) File "C:\programi\b281a\2.81\python\lib\subprocess.py", line 775, in __init__ restore_signals, start_new_session) File "C:\programi\b281a\2.81\python\lib\subprocess.py", line 1178, in _execute_child startupinfo)FileNotFoundError: [WinError 2] The system cannot find the file specifiedlocation: <unknown location>:-1
Yeah same place for issues, though i expect there to be lots :)Material preview is still broken with latest versions of Corona Renderer.Looks like your path to the corona standalone might be wrong?