For the migration part: you can use v-restore-user script with vesta backups, we’re still compatible with it.
Do not touch the configuration files in /home/user/conf, they will be rebuild on every upgrade and would got lost.
As @Lupu already wrote: You should have on a nginx+phpfpm installation the dropbox, if you use multiphp you can consider to upgrade to our release candidate 1.1.0, which have a reworked multiphp environment: Release data for version Ver 1.1