Since you are licensed, suggest that you upgrade to the latest paid 64-bit release. Two AVIs were tested without problems.
No other reports of corrupted AVI audio have been seen, but folks here would like to analyze your file. Please share it...
Upload the file/s to a free server, such as Google Drive or MS OneDrive, get a shared (public) link, copy the link and paste it here or to me in a Private Message via the mail envelope in the top-right corner of this forum. When using Google Drive, if necessary change "restricted" to "anyone with link can view."