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Hello,
I don't think the 1-click-ugrade module supports migrating from 1.6 to 1.7. Even if it could there's still a big chance your theme is not compatible with 1.7.
I suggest using a module like https://addons.prestashop.com/en/data-migration-backup/8934-migrationpro-prestashop-upgrade-and-migrate-tool.html and consider a new theme.