I Just installed Crative Cloud Lightroom try-version but when i open the program it say "An error occurred when attempting to change modules." ?

Try giving permission to Lightroom folder under
/Users/[user name]/Library/Application Support/Adobe
Steps
Click on Finder and on the menu bar ( top side the of the screen) click on Go > Go to,folder
In the window type exactly ~/Library and click on Go
Open Application Support > Adobe and right click on Lightroom folder and select get info
Under sharing and permission Click on lock and unlock it
Click on + add your current user name and administrator if not added
Then give Read and Write permission for Admin, system, everyone and (your user name)
Click on gear icon and choose apply to enclosed item
Then Click on Lock
Launch Lightroom and check.

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A forum thread from 3 years ago talking about LR 1.x which had this problem seems to need permissions fixed or new folders created with the corrected permissions. You might try doing a repair permissions for your user and/or run LR as an administrator user. I am a PC person so cannot tell you exactly how to do that.
https://forums.adobe.com/message/1457020

"an error occurred while attempting to change modules" when launching lightroom

I get the message "an error occurred while attempting to change modules" when I launch the app on my mac.
Every other adobe app works like Photoshop
I have followed all the troubling shooting steps in the link below, not one of them makes anything different. Except I tried the last one. I created a new account, simply logged in and launched the app and everything ran normally. No problem. However it doesn't say what to do if that works it just says try it.
Error changing modules | Lightroom
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I just found the answer for me.
I did step 5 on this support article:
Troubleshoot unexpected behavior | User account-specific | Adobe software | Mac OS
It is to repair the permissions on the hidden Library folders.

I have an active subscription but everytime I open the program it says trial expired. I have installed, reinstalled, and installed again. I have also installed the windows registry patch.

I have an active subscription but everytime I open the program it says trial expired. I have installed, reinstalled, and installed again. I have also installed the windows registry patch.
It wouldn't install for nearly 5 times I tried to do this. Now it's finally installed again but it won't budge past the trial version. I click BUY NOW but then it says "error you already have a subscription" then it times out and just stays on the Trial Expired page.

Hey kushlar,
Please log out from your Adobe application and login again.
Once you launch Acrobat and get error saying trial expired, you will find an option saying 'license this software'.
Select this option and enter your credentials.
Now check and let me know.
Regards,
Anubha

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Just a guess, but since everything is new, perhaps you have some sort of permissions problem.
Make sure your user has write access to all the locations mentioned in this link:
http://helpx.adobe.com/lightroom/kb/preference-file-locations-lightroom-4.html
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Surely the Adobe forums are the place for help with Adobe applications. The fact that the problem doesn't occur on your daughter's machine suggests that it's not an issue with Mavericks but a local problem on your own machine.

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I just checked your account, and see that it's active. Are you trying to sign in via Adobe Reader? If so, please choose Help > Check for Updates in Reader and make sure that it-s up-to-date. The most current version, 11.0.07, should alleviate that sign-in error.
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Howdy Allux345.
After multiple installations of iTunes it can be frustrating when the issue isnt resolved. I was able to locate the following knowledge base article that specifically addresses the "Error 7" you are recieving.
iTunes for Windows: "Error 7" message when opening iTunes
http://support.apple.com/kb/TS3074
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Thanks for reaching out to Apple Support Communities with your question.
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I found a solution in one of Apple forums. I will copy her post:
"  I was checking the differences between my normal admin User account/Library/Application Support/Adobe/Lightroom contents and the one on the clean other admin User folder in the same place on the G4 PB where Lightroom2 had launched normally and noticed that on the one that works there are a slew of folders (Develop Presets, Export Presets, External Editor Presets, Filename Templates, Filter Presets, etc etc). On the main admin account, there was only one, the first. So it seemed the install on that account didn't load all the needed info. I simply copied the missing folders from the account that worked into the Public folder, switched to my main account and added those missing folders in the proper place. Voilà!. Now Lightroom launches normally and I don't get the dreaded missing modules alert."
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I Just installed Crative Cloud Lightroom try-version but when i open the program it say "An error occurred when attempting to change modules." ?

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