Question about updating calibre

[library addict]

I have been running Calibe 4.3 for many years now on my Windows 7 PC. I am planning to get a new PC soon and will need to move my library.

I know about the Calibre's Export/Import feature as I have moved the library before.

My question is about updating Calibre. I remember going from Calibre 2 to 3 (or maybe it was 3 to 4) was a big change. Back then I used to update Calibre with every new release so kept up on the changes. I plan to read through all of the new features.

My plan is to install 4.3 on the new PC and move everything. I am just wondering once I am sure all of the libraries moved over successfully if I should jump to the latest version of Calibre or update incrementally to 5 then 6 then 7. I know a lot of the plugins will need to be updated as well. I just want to be sure all of my custom columns etc survive.

Thanks.