Stellar Repair for Access is used to scan and repair corrupt .ACCDB and .MDB files. The following points explain the differences between the Demo and the Paid versions of the software:

Demo Version Paid Version
It is the baseline trial version of the software which is available for free download. It is the full version of the software, which is registered and activated by using a paid license key.
Provides a preview of the repaired database - Tables, Queries, Reports, Forms, & Indexes. Cannot save the repaired database Along with preview, it also saves the database components - Tables, Queries, Reports, Forms, & Indexes. Recovers Macros, Modules & Relational Databases
Primary purpose is to help evaluate the core database repair function of the software. Saves the repaired components and restores all Objects including Deleted Records to a new Database.
Cannot save the scanned information. Saves the scanned information in DAT file format for reinstating the database repair process anytime later.