MDE and ACCDE files don't adequately protect your VBA source code.

Although compiled MDE and ACCDE files no longer contain the exact source code from the original file, they do contain a lot of extra compiler data that when combined with the compiled code, can be used to very accurately recover the original source code.  EXAMPLE

If you want to improve the protection of your MDE and ACCDE files, then you need to remove this redundant compiler data.  For this, you need Code Protector for Microsoft Access.

   Analyses your application and displays the vulnerable parts of your code

   Removes the vulnerabilities safely and securely (registered version only)

   Afterwards, decompiling the source code produces far less desirable results

   Supports Access files from v97 to v2013 (MDE, ADE and ACCDE file formats)

   Includes support for Access 2010 & 2013 64-bit ACCDE file format