Could not locate BpmsTrial.groovy

Hi there
I’m trying to install the free trial on Windows and get the following error:

C:\Users\PieterdeKlerk\Downloads\BpmsTrial-10.1-Windows.pkg\bin>grexec BpmsTrial -install

11/07/2018 20:20:09.10 INFO Execute ‘BpmsTrial -install’
11/07/2018 20:20:09.11 INFO Search “BpmsTrial.groovy” in GROOVY_PATH
11/07/2018 20:20:09.11 INFO Search “BpmsTrial.groovy” recursively in C:\Users\PieterdeKlerk\Downloads\BpmsTrial-10.1-Windows.pkg\tools
11/07/2018 20:20:09.11 WARN Could not locate “BpmsTrial.groovy” in C:\Users\PieterdeKlerk\Downloads\BpmsTrial-10.1-Windows.pkg\tools
11/07/2018 20:20:09.13 ERROR Could not locate BpmsTrial.groovy
11/07/2018 20:20:09.13 INFO grexec: ended with exit code 2

Any advise?