I installed TRP3 Extended then uninstalled it because I didn't think I'd need it and at the time I was worried addons were slowing WoW down, when I tried to download it again through twitch I got an error message (can't remember what it said though unfortunately) so I attempted to install it again and it appeared to work, but it didn't show up in my game.

I had the option on the 'toolbar' to open a custom item trade with someone but clicking it did nothing. I went through and removed every trace of Extended I could find from my file explorer and no longer have the icon for a trade, but the addon still doesn't appear to be working. I reinstalled through Curse instead of Twitch this time, but still nothing. When hovering over my character preview (with the 'Currently' section) it's listed as being TRP3 v1.4.4, and the Extended I attempted to download was version 1.2.0.

Here's a screenshot of what my addons tab lists: https://imgur.com/NIm0P67

Sorry if this issue is actually really easy to solve or is a hassle, I did what I could to fix it myself and I looked online for solutions but didn't find anything sadly :<
Thanks so much in advance for any help!

In Total RP 3 settings, there's a tab called "Modules status" with a list of modules.
Can you see Extended and Extended Tools in that list, what version number do they have and what is their status ? If it's an error, you should be able to get an error message by hovering on the little "i" button on the left of the modules.

Ah I forgot to check that, TRP3 Extended was disabled for some reason and reactivating it seems to have fixed everything.

Thanks for the help! ;v;