FYI in case anyone runs into the same problems I did. I recently bought a WD-100 dimmer to match one I installed a few years ago. The brand has changed a few times and is now the Zlink ZL-WD-100, but it is still the same WD-100 face with LEDs on the side and tap up/down dimming. Adding it worked fine, but I had trouble with enabling Central Scene (ie multi tapping). They both showed up in the zwcfg_*.xml file as zwaveproducts WD-100.
The original dimmer works fine with the Homeseer instructions found here https://www.home-assistant.io/docs/z-wave/device-specific/ but the new one required a slightly different configuration.
<CommandClass id="91" name="COMMAND_CLASS_CENTRAL_SCENE" version="1" request_flags="4" innif="true" scenecount="0">
<Instance index="1" />
<Value type="int" genre="system" instance="1" index="0" label="Scene Count" units="" read_only="true" write_only="false" verify_changes="false" poll_intensity="0" min="-2147483648" max="2147483647" value="2" />
<Value type="int" genre="user" instance="1" index="1" label="Top Button Scene" units="" read_only="false" write_only="false" verify_changes="false" poll_intensity="0" min="-2147483648" max="2147483647" value="7680" />
<Value type="int" genre="user" instance="1" index="2" label="Bottom Button Scene" units="" read_only="false" write_only="false" verify_changes="false" poll_intensity="0" min="-2147483648" max="2147483647" value="7680" />
</CommandClass>
Note: The "value"s in COMMAND_CLASS_SCENE are different from the Homeseer. The dimmer then responds like a Zooz dimmer to the following:
|Action|scene_id|scene_data|
|Single tap off|1|7680|
|Single tap on|2|7680|
|Double tap off|1|7860|
|Double tap on|2|7860|
|Triple tap off|1|7920|
|Triple tap on|2|7920|