So.. I think I figured a way around having the .dll... I could be wrong, but it's working for me, so it's worth a try.
What I did was copied the file for my characters located in the Shard folder inside my UOAssist folder and pasted that copy directly into my account folder. So, to explain this.
The default path for UOAssist is C:\Program Files\UOAssist
In the UOAssist folder you'll see a folder named Download and one named UOA-Settings along with the .exe for UOA. Open UOA-Settings.
In this folder you'll see the name of your account (in my case, lostkitten) and the UOAssist-Globals Folder. Click on your account name.
In this folder you'll see a TC1 Pub 45 folder, and a shard folder (in my case, Catskills) If you've tried to use UOAssist since the update you may also see folders with your character names. Click on the shard folder.
From here you can select all of your characters or a specific character if that's all you need until an update is available. Highlight, right click and copy. Then go back (that would be to the folder that has the Shard and TC1 Pub 45 folders) and paste the character folder(s) inside your account folder.
Visual Guide:
Hope this helps!
-LK