# Problems with glossaries after miktex update

I recently updated my Miktex distribution. After that the makeglossaries command did not work anymore. I'm using WinEdt 9.1 to call makeglossaries. I reinstalled the whole Miktex distribution and reinstalled active perl. I tried to use makeglossaries from the command prompt with the same result. I used xindy from the command prompt. This worked, so I think it's not a problem with perl. I tried to compile this MWE:

\documentclass{scrartcl}
\usepackage[nomain,acronym,xindy,style=long]{glossaries}
\makeglossaries
\newacronym{a}{a}{a}

\begin{document}

\printglossary[type=\acronymtype,]
\end{document}


Here is the message in the log file:

makeglossaries.exe: The script is not registered.
makeglossaries.exe: Data: scriptInterpreter="perl.exe", name="makeglossaries"

MakeGlossary failed to create a gls file.
For possible explanations start the command from the Command Prompt...


Has anybody an idea what I can try next?