It looks like it could be a while until tModLoader updates to support 1.3.5. I know there's a patch available, but it only works on Windows at the moment. In the meantime, if anyone wants to download 1.3.4.4 again, you can get it through Steam. You just need to use the steam console. I've only tried this on Linux, so I can't guarantee it'll work on others. I see no reason why it wouldn't though.
Step 1: Close Steam if it's running.
Step 2: Launch Steam with the "-console" flag....
How to Downgrade Back to 1.3.4.4
Step 1: Close Steam if it's running.
Step 2: Launch Steam with the "-console" flag....
How to Downgrade Back to 1.3.4.4