I bought a software as a dmg file. It came with a license which was expired on 31st October 2018 So, I bought a newer version of that of that software with a license for the next 12 months.

When I installed that new software and open it. It says that your license is expired. When I clicked on the license tab. It shows the expiry date which is 31st October 2018

I wanted to know how I can completely remove that software from my system so, that I can re-install the newer version of it and get the upgraded license.

Note: I know how to do it in a Windows machine by removing the registry of that software or using 3rd party software such as uninstaller pro.

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    Welcome to Ask Different. Other than a bland answer of "contact the vendor" you might need to edit this to explain a little what software you're using. Since licenses are there to prevent theft many vendors refuse to document the ways they license things but perhaps if you have a widely used product someone will know offhand how to help. – bmike Nov 17 at 17:52
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    Just edit your post with some details and the hold that I placed on it will be reviewed for reopening. – bmike Nov 17 at 17:52
  • I've added more information to it. – P082 Nov 17 at 18:36
  • You should get the app "App Cleaner and Uninstaller". This will remove all files associated with the app you select. Its available at the App Store and is free. – jmh Nov 17 at 18:38
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    As the developer can choose many ways of setting the license how does App cleaner know what files to remove? – Mark Nov 17 at 21:06

There is no registry on macOS so the developer can choose from many ways to license the software. Some store files and licenses in your user keychain, others in your user library. If the software is licensed per computer (say three people have user accounts on your mac but all can use the software) then the license key would be stored in the system area.

I would start with the vendor to get the uninstall / unlicense steps needed for however they choose to implement their licensing scheme. It could be a preference that is cryptographically signed or something as trivial as writing a hidden (or obscurely located) file on the filesystem.

Things like this are why App Store and buying apps through Apple is so compelling - all this confusion on licensing is cut through with a simple to understand model. Unfortunately - many vendors still try the old ways or think they can save money by not supporting their customers. This vendor is doubly unfair since the new install should clean up after the old if the old uninstall process left behind detritus or they don't have a clear path to get support.

I'm glad to see they did support you and resolve this issue. Feel free to add an answer if you learned where this vendor stores their licenses or if it was just re-running their license tool that fixed it.

  • Didn't got a great solution but, after fighting with the company they did a remote sharing with me and installed a new license. – P082 Nov 17 at 20:06
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    Sheesh. At this point I’m curious to know who the vendor is so I never buy anything from them! – TJ Luoma Nov 18 at 5:19

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