Various versions of database projects from Microsoft Access (.ade, .acccdp) can only be reliably handled in the original tool, no 3rd party software will help you. So if you are hoping to transform compiled older .ade projects to newer .accdp projects, you will have to use MS Access 2007 or later.
Convert Microsoft Access compiled project to Microsoft Access project.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert ade to accdp on Windows
A popular relational database management system for Microsoft Windows, Microsoft Access is sold as stand-alone application, or as a part of Microsoft Office suite Professional edition and higher. Access uses own database format, to build databases, based on Jet Database Engine and also can import databases created by other applications.
Common file extensions for Access databases are accdb and mdb (previous MS Access versions).
Convert from ade file
to accdp file
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.