Fix error and download alleg40.dll

ERROR: The application could not start because alleg40.dll was not found.

ERROR: The entry point to the procedure alleg40.dll was not found.

ERROR: dllregisterserver entry point not found - how to fix alleg40.dll

How to register alleg40.dll in Windows

How to unregister a DLL?

Causes of errors in the file alleg40.dll