I have Windows 10 x64 v1703 v15063 and BOINC Manager 7.6.33 working fine for a long time. Today I got an update notice to version 7.8.2. I exit for the BOINC program. I downloaded the update. I installed it on the previous one. Everything seems to be going well and the tasks in progress have been preserved.
But when I give the properties of a project does nothing, the BOINC window disappears, the system icon disappears even though BOINC is still running hidden.
I have uninstalled everything. I've lost all the work I've been running. I have reinstalled 7.6.33 and will never change version again.
I tried it in VMWare with a clean windows and it makes the same error: it does not show the properties of the projects and closes the BOINC window and the system icon although it continues running. Therefore, it is not due to a windows in corrupt state.

Cause of the bug identified 100%.
I have tested BOINC 7.8.2 on VMWare with Windows XP SP3 Embeded x32 and the error happens again same. Then I thought they have in common the different versions of BOINC and the only thing is the language in Spanish.
I have changed the language of BOINC to English and the error does not occur. I put it back is Spanish and reappears.
I have checked that in version 7.8.2 the languages have been revised according to the notes of the version, so it seems that they have created this bug.
"Newly translated localization files."

I have uninstalled everything. I've lost all the work I've been running.

Even in Windows XP there's a separate data directory which means you can uninstall BOINC and not lose any of the work in progress. Unless you told the BOINC installer to look elsewhere for the data directory.

I tried it in VMWare with a clean windows and it makes the same error: it does not show the properties of the projects and closes the BOINC window and the system icon although it continues running. Therefore, it is not due to a windows in corrupt state.

Seeing the amount of work you've done to try to reproduce the problem, why not become an alpha tester? There's at the moment 1 person testing for Windows XP. That may not be enough to find all problems with BOINC in that operating system.

I'll forward your report to our localization specialist, as I don't see how a different language can make BOINC Manager crash. Thanks for that though

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Forget Windows XP and VMWare, it was just for testing.

I use Windows 10 x64 v1703 v15063 and BOINC fails in Spanish language when giving the properties of a project.

Windows 10 has a separate data directory as well. By default it lives at C:\Programdata\BOINC\ and is a hidden directory. An uninstall of BOINC doesn't touch this directory or any files therein. Unless you specified a different directory and had the older BOINC install to the default directory, that's then when work gets lost. It isn't lost, it's just in a different directory your BOINC isn't looking into.

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Thanks but I do not much care about the lost work. It was only a few hours and it was my fault because I deleted the data folder manually.

What I do worry about is that BOINC has the language bug in Spanish when you click on the properties of a project.

Try it yourself.

Boinc 7.8.3 also has this Spanish language bug when giving properties to a project.

Registered as critical in https://github.com/BOINC/boinc/issues/2165

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The upcoming BOINC 7.8.3 version will not have a bug fix for this problem, it's even possible that future versions have this problem as well. As far as we can figure at this time, it's a missing character in one of the variables that's causing this. But more problems have been found with the Spanish translation, it may even be required that the whole Spanish translation needs to be checked and (re)done.

If you think you can do it, you can make an account at Transifex and translate BOINC into Spanish.
If you're waiting for someone else to do it, it may take longer, or even never get done.

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After I reported the issue in BOINC github, the developers have looked into it and fixed the problem.
I have gotten the correct language file from the translation manager and tested it with BOINC 7.8.3 and I can no longer reproduce the problem.

You can do so too:
Download BOINC-Manager.mo from my Dropbox: https://www.dropbox.com/s/on76f82uxx5r69p/BOINC-Manager.mo?dl=0
If BOINC is running, do File->Exit and at least exit BOINC Manager.
Navigate to your BOINC Programs directory, default at C:\Program Files\BOINC\
Open the locale folder
Open the es folder
Copy the BOINC-Manager.mo file from my Dropbox into this folder, click Yes to overwrite the previous file.
Now restart BOINC Manager
Options
Other options
Change the language to Spanish
Selecting any project in the Projects tab and then clicking Properties will now show the properties.

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