running cs update results in exception

[martijnhoekstra]

C:\Users\marti>cs update
[snip]
Exception in thread "main" java.nio.file.AccessDeniedException: C:\Users\marti\AppData\Local\Coursier\data\bin\.cs.aux.exe
        at sun.nio.fs.WindowsFileSystemProvider.implDelete(WindowsFileSystemProvider.java:269)
        at sun.nio.fs.AbstractFileSystemProvider.deleteIfExists(AbstractFileSystemProvider.java:108)
        at java.nio.file.Files.deleteIfExists(Files.java:1165)
        at coursier.install.Updatable$.get$1(Updatable.scala:82)
        at coursier.install.Updatable$.$anonfun$writing$1(Updatable.scala:96)
        at coursier.cache.CacheLocks$.loop$1(CacheLocks.scala:72)
        at coursier.cache.CacheLocks$.withLockOr(CacheLocks.scala:98)
        at coursier.install.Updatable$.writing(Updatable.scala:96)
        at coursier.install.InstallDir.createOrUpdate(InstallDir.scala:335)
        at coursier.install.InstallDir.createOrUpdate(InstallDir.scala:82)
        at coursier.install.InstallDir.$anonfun$maybeUpdate$13(InstallDir.scala:377)
        at scala.concurrent.Future$.$anonfun$apply$1(Future.scala:659)
        at scala.util.Success.$anonfun$map$1(Try.scala:255)
        at scala.util.Success.map(Try.scala:213)
        at scala.concurrent.Future.$anonfun$map$1(Future.scala:292)
        at scala.concurrent.impl.Promise.liftedTree1$1(Promise.scala:33)
        at scala.concurrent.impl.Promise.$anonfun$transform$1(Promise.scala:33)
        at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:64)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
        at com.oracle.svm.core.thread.JavaThreads.threadStartRoutine(JavaThreads.java:497)