I have selected the wrong languages during setup. I have tried to deactivate the license, uninstalled and reinstalled the software. Whatever I do, the settings always persist. I cannot open any files now as they have different language settings. Please also see screenshot attached. What can I do? I am a bit lost and I have already spent a lot of time figuring it out.
It is possible to reset your installed languages which will then prompt you to enter your 5 languages when you next open Studio... Here's how:
Close all SDL products.
In your 'Type here to search' window at bottom left of your screen, type 'regedit'.
Open the Registry Editor.
Either search manually:
The actual address for Studio 2019 is HKEY_CURRENT_USER\Software\Microsoft\LDSRClient15 (see other version numbers below*)
Or use the search box:
Click on 'Edit > Find' or use Ctrl+F
In the box that appears, type 'LDSRClient15' for Studio 2019 then hit 'Find'
*it would be 'LDSRClient5' for Studio 2017 or -1,2,3 or -4 for earlier versions
The search will take a while as the registry is very long and very complex:
When the registry key appears, right-click on it and select 'rename'.
Add 'old' to the end of the LDSRClient15 (or -1,2,3,4or5) Name.
Close the registry.
Open Studio and you should find that it prompts you to add your 5 languages again. Note that you don't need to add more than one variant of any language as all other variants of that language will work once it has been added, and you need to include your usual source language only once.
Only do this if you feel confident enough to change your PC registry. If not, contact installation support here:
Fill out the form, tick 'Installation' on the Case Type dropdown menu, explain that reinstalling did not solve your problem, quote this post as they may not know how to do the above, and give them an accurate email address to contact you on.
All the best,
Ali 
I'm glad this worked.
It would be a VERY good idea to include the option to change languages in the software. I guess the answer to your question may be that it would require a whole lot of reprogramming to achieve it. As I don't work for SDL, I don't know.
You could add this as an idea here:
https://community.sdl.com/ideas/translation-productivity-ideas/i/trados-studio-ideas/create
I'm sure lots of people would vote for it.
All the best,
Ali 
YAAAAAY that is EXCELLENT news!
Though, do you mean that when setting up the Freelance version, you don't have to choose any languages as all will be accessible?
Thanks!!!
Ali
Correct.
Wonderful news!!! I prefer the Pro version for all sorts of reasons but this will be so useful to so many freelancers!
Ali 
Studio 2021 is EXCELLENT! You must at least get the trial version. It has some great new features and some of the existing ones have improved and it is WHIZZY FAST too!
Ali
Super! 
Translate
