Can’t access WP Supercache settings or deactivate the plugin

define(‘WP_CACHE’, true);
define( ‘WPCACHEHOME’, ‘/homepages/23/d667160699/htdocs/app695267207/wp-content/plugins/wp-super-cache/’ );

@dima333750 – Thanks for your response :). These are already in the file though. I’m completely out of my depth/newb so I think I’m going to have to find someone who knows what they’re doing to have a look for me before I break something!

Also getting message:

Warning! /homepages/23/d667160699/htdocs/app695267207/wp-content/advanced-cache.php does not exist or cannot be updated.
If it already exists, please delete the file first.
Make /homepages/23/d667160699/htdocs/app695267207/wp-content writable using the chmod command through your ftp or server software. (chmod 777 /homepages/23/d667160699/htdocs/app695267207/wp-content) and refresh this page. This is only a temporary measure and you’ll have to make it read only afterwards again. (Change 777 to 755 in the previous command)
Refresh this page to update /homepages/23/d667160699/htdocs/app695267207/wp-content/advanced-cache.php
If that doesn’t work, make sure the file /homepages/23/d667160699/htdocs/app695267207/wp-content/advanced-cache.php doesn’t exist:
Open /homepages/23/d667160699/htdocs/app695267207/wp-content/plugins/wp-super-cache/advanced-cache.php in a text editor.
Change the text CACHEHOME to /homepages/23/d667160699/htdocs/app695267207/wp-content/plugins/wp-super-cache/
Save the file and copy it to /homepages/23/d667160699/htdocs/app695267207/wp-content/advanced-cache.php and refresh this page.

This is also way beyond me so I’m going to have to learn some more fundamentals before getting into this – appreciate your input though – thanks again!

If you want to delete it manually:
Make a backup
Disable caching and clear cache (preferably in 3 ways)
Deactivate the plug-in (if possible)
Remove from wp-config.php define (‘WP_CACHE’, true);
Remove from the .htaccess rules added to the #WPSuperCache section
Remove /wp-content/advanced-cache.php and /wp-content/wp-cache-config.php
Remove /wp-content/cache/
Remove /wp-content/plugins/wp-super-cache/

That would be ideal but I can’t access the plugin to disable caching and clear the cache (I’m not sure what you mean by three ways – I really am a novice!).
Also I can’t deactivate the plugin.
When I try to deactivate I get this message:

”Warning: fopen(/homepages/23/d667160699/htdocs/app695267207/1169417680.php): failed to open stream: Permission denied in /homepages/23/d667160699/htdocs/app695267207/wp-content/plugins/wp-super-cache/wp-cache-phase2.php on line 1070
Could not remove WP_CACHE define from /homepages/23/d667160699/htdocs/app695267207/wp-config.php. Please edit that file and remove the line containing the text ‘WP_CACHE’. Then refresh this page.”

I also don’t understand what ‘Remove from the .htaccess rules added to the #WPSuperCache section’involves or means.

When I open the files from the FTP in Notepad there are no line breaks at all, just an unbroken stream of letters and symbols, so to remove or edit a line or rule is pretty much impossible for me as this is like a foreign language to me.

I think I need to learn the fundamentals before I attempt to do anything to these files
I really appreciate you trying to help though, thank you.

I now have Notepad++ which is making things legible to me at least (and a little more confident).
How do I disable caching and clear the cache without the plugin?