Thanks for the response. Could you please confirm that the way to back up my database- 1. right click on the database, 2. select export database as zolca file and 3. save in any location. Actually I started to use OpenLCA on 2016, that time I installed version 1.4.2. Now I want to shift my database in my new desktop. So, If I install 1.4.2 in my new desktop, then how do I update my database version (that I worked using 1.4.2. ) to 1.8. Please let me know how do I update it for 1.8. I tried to update this database with 1.8, but it was not work.