in general you should be able to call an application named
foo.exe from powershell by either writing
foo.exe (i briefly tested this with another application).
however, i just realised something: opensearch doesn’t seem to have a windows binary release yet, so you don’t have any
opensearch-plugin.exe available (and
opensearch-plugin is a linux binary): [Meta] OpenSearch / OpenSearch Dashboards - Windows distribution (X64) · Issue #33 · opensearch-project/opensearch-build · GitHub