Hello Mal Content,
Why would they disappear from your secured vault?-sorry to say, Please explain what you mean secured vault?
There is no way to disappear the Encrypted files. Please check the File location Both files are encrypted state only. you can open/decrypt the encrypted file in the AxCrypt app.
AxCrypt application will not disappear/decrypt/remove files automatically. Without user interaction AxCrypt application will not same the file in the user’s system
You can check your files are extension with .axx. AxCrypt files are decrypt with AxCrypt application only.
We can decrypt the encrypted files by using the file password which was used in the file encryption process.
Still, you are asking any Query/issues, please provide more information about the issue and write a mail to firstname.lastname@example.org.