Moving all to a fresh install.... because of many problems....

I have 3.90 that has been upgraded from 2.3 and have several plugins. 3000 products.

Is there a easy way to do a fresh install that dont have errors and move all the products etc?

Thank you!

The ideal way to upgrade existing installations with products has always been running the upgrade scripts provided in each subsequent versions. That's because each version adds/deletes/updates database structure to some extent, so to make sure that everything works, it's best to run the upgrade scripts from 2.3 to 3.9 one at a time in that order and then use this database for your nopCommerce installation.