Legacy blocks

[Silentskies]

I've been using FL Studio and I've had Legacy blocks enabled forever and never had a problem with it but some how I was messing around with my new track and I don't know what I clicked but now legacy blocks are disabled and I cant get them back. I disabled and enabled legacy blocks and it didn't do anything! I'm using FL Studio 10 but I cant get it back working. Can someone please tell me how I can fix this?

Thanks in advance