Upgrading from 1.x

Start 2.0 with your 1.x files: it copies config.yml and messages.yml to backup/<date>-spanish/, writes the new config.yml with your values (English keys: placas → plates, fuerza → forward, altura → up, bloque-debajo → blocks-below, mundos → worlds, enfriamiento → cooldown…) and language: es, moves only the texts you had changed to lang/es.yml, and leaves a MIGRATION.txt. Commands and permissions do not change.