1. Find the manifest of the version you want to download. The Relative Date is associated with when the update was released. In this case, powerlocked doors would be in 9176941555094883405 https://steamdb.info/depot/2551021/manifests/
2. Press windows key and r.
3. Enter steam://open/console into the prompt that comes up.
4. Enter the command: download_depot 2551020 2551021 <manifestID>. Enter the manifest of the version you wish to download into <manifestID>. For example, downpatching to any previous release such as one with powerdoors bug would be

download_depot 2551020 2551021

1. Wait for it to download. This may take a while. Once it is downloaded, it will give you a prompt (a message in the console) saying, "Depot download complete."
2. To find the files, navigate to your Steam folder and go to Steam\steamapps\content\app_2551020\depot_2551021
3. Right click on One-Armed Robber in your steam library, go to manage, and then click browse local files.
4. Delete all of the files under the folder: Steam\steamapps\common\One-armed Robber Make sure to not delete the folder itself.
5. Alternatively, you can rename the folder so that you can up-patch to the current latest whenever. Just make sure you rename the folder named depot_2551021 to One-armed robber
6. If you went with the former, just deleting the files, drag all of the files under Steam\steamapps\content\app_2551020\depot_2551021 into the now empty One-armed robber folder.

You may have to repeat this a couple times if Steam decides to automatically patch you to the latest. You can circumvent having to repeat this multiple times by making the downpatch into a zip file that you just extract whenever, after installing the downpatching (and for simplicity sake, renaming the folder to One-armed robber). Just make sure to get rid of the folder named One-armed robber in steamapps\common\

Copied from the thread;

was asked to make it a guide.

Wasn't aware I could do that here which was why I made it a thread originally