public function isCurrentThemeCompatible( $version = 1, $theme = null ) {

		if ( null === $theme ) {
			$theme = wp_get_theme();
		}

		$basepath = $this->getDir( $theme );

		$types = [
			'prince',
			'epub',
			'web',
		];

		foreach ( $types as $type ) {
			$path = '';
			if ( 1 === $version && 'web' !== $type ) {
				$path = $basepath . "/export/$type/style.scss";
			} elseif ( 1 === $version && 'web' === $type ) {
				$path = $basepath . '/style.scss';
			}

			if ( 2 === $version ) {
				$path = $basepath . "/assets/styles/$type/style.scss";
			}

			$fullpath = realpath( $path );
			if ( ! is_file( $fullpath ) ) {
				return false;
			}
		}

		return true;
	}