Yes, old version can be upgraded to the latest build.

NOTE: Please be sure to BACKUP previous version including database before upgrading ACEN to the latest version


STEP 1: Identify your existing version.

Version number is located in web.config file (acen_version_number).


STEP 2: Identify required database upgrade scripts.

All SQL scripts are located in \database sub-folder. All scripts are named accordingly to ACEN version.

For example, upgrade script for upgrading database from 2.10.00 to 2.20.00 version is named: 2.10.00-2.20.00.sql

You need to run upgrade scripts on your acen database, one by one, starting from the oldest one.


STEP 3: Preserve original acen.config and web.config files.

In most cases you may continue using original files.

However in some cases you'll need to overwrite old versions of these files with latest ones and then manually set appSettings section  (sql_connectionstring, sql_database_name,acen_version_number and acen_version)

 
STEP 4: Replace all other files with the files from latest version.

Delete App_Code, bin, database, controls, jquery and images folder and copy the folders from latest acen installation folder.

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