Wyse Device Manager (WDM) is End of life and end of sale. 

For new deployments you will want to use WMS. 

If you are trying to migrate from WDM to WMS there are guides available at. https://www.dell.com/support/home/us/en/19/product-support/product/wyse-wms/manuals

This item is not available anymore for purchase. Its End of Life End of support.

Game over. End of Service Life (EOSL)

https://www.dell.com/en-us/work/shop/wyse-endpoints-and-software/wyse-device-manager-wdm/spd/wyse-wdm

<ADMIN NOTE: Broken link has been removed from this post by Dell>

Wyse transitioned to Dell so I would say you have to ask Dell support.

Dell acquired Wyse Technology in 2013.

Typical SDLC is 5 years.

So EOSL would be 2018.

https://www.dellemc.com/en-us/services/support-services/index.htm

Licensed Wyse software and digital Licenses that were available in the Wyse Self Service Portal are now available through Dell Digital Locker. Dell Digital Locker allows you to access licensed software products, download license keys, view software entitlements, and more.

Software titles and product keys available in Dell Digital Locker are:

1. Wyse Device Manager
2. PC Extender
3. Thin Client Extender
4. ThinOS Maintenance
5. ThinOS Lite Maintenance
6. Cloud Client Manager

The Dell Digital Locker allows you to view and manage your products, software, subscriptions and licensing information in one location. You can:

Download purchased software
Access licensed software products
Download updates and patches
Manage user and product groups
View software license entitlements
Manage warranty subscriptions