Yes, previously generated files can be downloaded from your history. To access this, first make sure you're logged into your account.
How to download files generated using Text to Speech
Select Text to Speech in the sidebar, then access your history by clicking the history tab in the panel on the right side of the screen. On narrow screens, you can access your history by clicking the history icon above the Generate speech button.
From your history, you can click the download icon to see the option to download as either an MP3 or WAV file. For more format options, including M4A and FLAC, click Advanced.
How to download files generated using Voice Changer
Select Voice Changer in the sidebar, then access your history by clicking the history tab in the panel on the right side of the screen. On narrow screens, you can access your history by clicking the history icon above the Generate speech button.
You can click the download icon to download any file from your history as either an MP3 or WAV file. For more format options, including M4A and FLAC, click Advanced.