Hi everyone,

I'd like to upgrade LS from 2.72.5 to 3.7.3 .
I've read the manual, in particular goo.gl/kpdHSj , can I follow the same instruction provided to upgrade from
version 1.50 or later to any later 2.xx version?

An other way could be:

1-To intall last stable version and replace surveys' and users' tables with the 2.72.5 ones.
2-Open http://<mydomain>/<mylimesurveydir>/admin to update the tables

I haven't custom themes .
Which way do you suggest? Thanks in advance.

Absolute best way: Buy the Premium Package, update with ComfortUpdate (and get technical support if something happens).