The plugin does not support the basic idea of asdf

[vitalis]

The basic idea of asdf that you can manage different versions of tools in different projects..
The plugin solves only one thing: install
The helm env variables are the same for each version, here is an example:
HELM_BIN="helm"
HELM_BURST_LIMIT="100"
HELM_CACHE_HOME="/Users/vitalis/Library/Caches/helm"
HELM_CONFIG_HOME="/Users/vitalis/Library/Preferences/helm"
HELM_DATA_HOME="/Users/vitalis/Library/helm"
HELM_DEBUG="false"
HELM_KUBEAPISERVER=""
HELM_KUBEASGROUPS=""
HELM_KUBEASUSER=""
HELM_KUBECAFILE=""
HELM_KUBECONTEXT=""
HELM_KUBEINSECURE_SKIP_TLS_VERIFY="false"
HELM_KUBETLS_SERVER_NAME=""
HELM_KUBETOKEN=""
HELM_MAX_HISTORY="10"
HELM_NAMESPACE="default"
HELM_PLUGINS="/Users/vitalis/Library/helm/plugins"

It means that any helm plugin that will be installed is shared across all helm versions...