MemoQ does not launch - Activator version mismatch
Thread poster: BMarkiewicz

BMarkiewicz  Identity Verified
Local time: 20:11
Member (2005)
Polish to English
+ ...
Sep 11, 2017

MemoQ (any version) does not want to launch on my computer (Windows 10). After MemoQ 2015 froze during a translation, I restarted Windows. This usually resolves most issues, however neither version of MemoQ that I had (2013 or 2015) would open, I would only get a general error message with the following content:


Activator version mismatch


em MemoQ.Activator.Activator.pInit(ProductGroups productGroup, Boolean tsManager, Edition requestedEdition)
em MemoQ.ActivatorStartupController.Initialize()
em MemoQ.MainWindow.Main(String[] args)

I am convinced this has to do with a corrupt file. I have tried deleting the Preferences.xml file in the Roaming folder as well with no success. Any advice would be appreciated!

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John Fossey  Identity Verified
Local time: 14:11
Member (2008)
French to English
Reinstall Sep 12, 2017

Have you tried uninstalling and then reinstalling? This will usually fix corrupted file problems. Be sure to create a restore point first.

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Russian Federation
Local time: 22:11
English to Russian
Try erasing C:\ProgramData\MemoQ Oct 8, 2017

Hello, just received the same kind of problem.

Simple uninstalling/reinstalling didn't work. So I've tried removing C:\ProgramData\MemoQ folder and reinstalled MemoQ.
Please let me know, if this works for you.

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MemoQ does not launch - Activator version mismatch

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