Since most formats are similar we can probably resolve this. Please send a copy of one or two of your old programs to us for analysis at email@example.com
You can reactivate your license with the original e-mail and key.
You can customize what file extensions that MazView will show in the file-list. In the setup under the tab “File extensions” there's comma-separated field with allowed file-extensions.
You can set the language used for displaying the program under Settings - Previewing. This setting is save per preset so different presets can be setup with different languages.
In the folder %programdata%\MazView (Usually C:\ProgramData\MazView depending on OS) the machine settings are located and can easily be removed by just deleting the file named as you machine preset