How to migrate store from opencart version 1.5 to 2.0.1?

Question

opencart

Good night all! Please tell me how to transfer the working store on opencart 1.5 to version 2.0.1. The customer has a working store on version 1.5. He bought a template that works with version 2.0.1. I already tried to demolish the completely old version, installed the theme (works fine), then imported the data from the database. And everything flies, produces a bunch of errors. Theoretically, it is easier to do from scratch, but there are a lot of goods and other data. Is it really possible to do this at all? Thanks in advance to all who respond!

Answer 1

as an option to export from the old version to a file and import to the new one, there are plugins for this

Answer 2

try to make an upgrade on the test, in my opinion I saw instructions for updating somewhere in the archive with the engine. BUT! Third-party modules will stop working!