Odd. Under OPTIONS | DISK tab, Clear Unused Cache Files. It's wise to do this before beginning a new project.
Or they can be manually cleared. The Sound Cache is a subfolder of the Videopad Cache.
"C:\Users\<PC Name>\AppData\Local\Temp\VideoPadCache"
Install the latest For licensed users upgrades are free for up to six months from purchase date. After that, VP will continue to fully function but a fee will be required in order to register the newest. Retain your old install file and registration info.
Please let someone check out the project, to see what they come up with. It's easy, quick and can be private. Follow these four steps carefully...
Back up --- With your project on the timeline, click on MENU at the top-left. Click FILE|BACK UP PROJECT FILES TO FOLDER. Choose a folder and SELECT FOLDER.
Upload --- Upload the saved, numbered FOLDER. Use a free server - Google Drive, MS OneDrive, etc.* Do NOT upload the individual VPJ or export file.
Get link --- Get a public link. If using Google Drive click GET SHAREABLE LINK. Change "restricted" to "anyone with the link can view" Click COPY LINK | DONE.
Share --- Paste that link here, or click the folder at the top-right of this forum to message it privately to me. It won't be shared.
* Before uploading, right-click the folder, click PROPERTIES. Look at the File Size to confirm that it's not too big for the free space on the server.