Solution:
You don’t need multiple .htaccess
you can put all the rules on the WordPress main .htaccess
:
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !^folder
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress
Use either:
RewriteRule ^folder/start\.php$ /folder/index.php [R=301,L,NC]
Or
Redirect 301 /folder/start.php http://www.domain.com/folder/index.php
Don’t forget to change folder
to your actual folder name.