@DLONG2 identified the issues, four fields are no longer sending numeric (float) values, but now send a character.
If anyone wants to solve it more elegantly than I have, great. I took the easy way out though.
Edit the DB Table and change the four values from Float to nvarchar(50). It shouldn't have any bad effects, since it's not like those fields are used anywhere in the current state of the program anyway.
(In the GUI you can simply Right Click the Table -> Design
Update the fields (near the bottom) and save it. You will see a warning that it may take a while (took a second or two for my machine).
Once done, I re-started the downloader and it grabbed and imported everything from today.