windows version it says that 2.4 version but downloads only 2.1
and when click in update it download the file but not installs it.
If it's the Windows store version, follow the instructions on the download page.
If you want to update and you don't see the new version on the Store website
Search for Microsoft Store on your computer, type in BoincTasks Js and click on it, you will most likely see an update button.
in the windows version when you point at: BoincTasks Js (Windows) version 2.4
you get http://efmer.eu/download/boinc/boinc_tasks_js/windows/boinctasks-js-2_1_0.exe
if you copy the link and exchange the 2_1_0 by 2_4_0 you download the correct file.
Microsoft Store version only install x86 version.
Corrected now points to 2.4.
You should be able to update in app BoincTasks Js -> Help -> Update
now version 2.4.2 in windows is pointing to:
BoincTasks Js (Windows) version 2.4.2 (http://efmer.eu/download/boinc/boinc_tasks_js/windows/boinctasks-js-2_4_1.exe)
version 2.4.1
V2.4.1 had a serious bug and is replaced by V2.4.2.
WordPress has a problem storing links, should be fixed now, I checked it twice, it still didn't replace the text.