fix(guide): Downloaders - Improve Slackware instructions. (#2079)

* Fix(guide): Downloaders - Improve Slackware instructions.

* Fixed: Replaced v16 with v15 to prevent confusion.

Where `v16` would be `Slackware64` current for `unRAID 7.x`

includes/downloaders/nerdtools-replacement-package-slackware.md

@@ -7,13 +7,21 @@ In your Unraid terminal, type the following to determine your Slackware version.
 cat /etc/slackware-version
 ```
 
-Then go to [https://packages.slackware.com/](https://packages.slackware.com/){:target="\_blank" rel="noopener noreferrer"} to find the correct 64-bit version of the required package.<br>
-Download it and add it to your Unraid flash drive located in the `boot/extra` folder. It will be installed upon Unraid boots.
+Then go to [https://packages.slackware.com/](https://packages.slackware.com/){:target="\_blank" rel="noopener noreferrer"}
 
-Currently:
+![Slackware v15 Search](images/slackware-search-v15.png)
 
-- `Slackware64 15.0` for `unRAID 6.x`
-- `Slackware64 current` for `unRAID 7.x`
+1. Select the correct 64-bit Slackware version from the release dropdown box.
+
+    Currently:
+
+    - `Slackware64 15.0` for `unRAID 6.x`
+    - `Slackware64 current` for `unRAID 7.x`
+
+1. Type in the required package you're looking for in the search box.
+1. Download the required packages.
+
+Put them in your Unraid flash drive located in the `boot/extra` folder. It will be installed upon Unraid boots.
 
 !!! info "To remove the old/wrong packages (that NerdTools installed for an earlier Slackware version), overwrite them with the new versions on your Unraid flash drive in the `boot/extra` folder. Place the correct versions there and then reboot."
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