Permalinks geändert - Design zerschossen - Ursache???

Hallo liebe Spezialisten!

Habe als WP Neuling die Permalinks von "einfach" auf "Beitragsname" geändert und dabei mein Design teilweise zerschossen.
Was könnte die dafür Ursache sein? Die Postings und Seiten sind alle erreichbar, aber z.B. die Formatierung der Navigation ist völlig zerstört.
Backup (UpdraftPlus) habe ich gemacht aber bei Zurückspielen gab es leider Fehlermeldungen und mein Problem besteht weiterhin.

LG
Niko

Link zur Seite: http://beate-gerd.at
Wordpress 4.7.3
Theme: The7

.htaccess Einträge im Folder der index.php Datei

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AddHandler x-mapp-php5.5 .php

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