If you using the jLogbookserver version,

1. archive the existing Demo database to a text file using:
jLogbookserver --instance=Demo --exportdata c:\temp\demo.txt
You will need to run this from the c:\program files\jLogbook directory in a command shell.
2. Create a new sql server database. I used qtado to do this and I called the database pbmsql,
3. Add an instance in your jLogbook.prefs file. Mine looked like this:
Pbmsql = Common:
   DBNAME = "pbmsql"
   DBHOST = HURLEY
   DBUSER = "sa"
   DBPASSWORD = ""
   DBPROVIDER = "SQLOLEDB.1"
   DBTYPE = "sqlserver"
   attachmentsdir = "attachments/demo"
   sessionkey='pbmsql-change'
   gridrefreshinterval=30
   formheight=45
   gridheight=55
   logform:
   MESSAGE:
      SPELLCHECK = "True"
It is important that the database connection information is correct.
4. Add the index reference at the bottom of the jlogbook.prefs page. I.e.
  IndexPage = Demo:
   serverclass = jlogbook.jLogbookMultiServer
   title = "jLogbook Menu Page"
   instances:
      Demo = Demo
      Logs = Logs
      KnowledgeBook = KnowledgeBook
      OrderBook = OrderBook
      HandoverBook = HandoverBook
      Legacy = Legacy
      Pbmsql = Pbmsql
5. Run the restore command. I.e.
jLogbookserver --instance=Pbmsql --importdata --restoreconfig c:\temp\demo.txt
You will need to run this from the c:\program files\jLogbook directory in a command shell.
6. Run the jLogbookserver command and in the browser (IE or Firefox) enter the URL http://<name of computer>:8080 and select the new instance. You should see the same data as the demo, but this time it will be coming from a SQL Server database not an access database.