It just stopped? Don't really know how or why, I was working with a patch and all of a sudden the command for ~ is no longer recognised. I've reinstalled pd, checked and deleted all the externals, and yet the problem still persists. Am I just missing something super rudimentary or is this just a bug?

@Help Do you have a Scandinavian keyboard or a German Mac keyboard and the layout has changed?
Otherwise maybe update to Pd 0.50-2 ....... https://forum.pdpatchrepo.info/topic/1520/pure-data-windows/7
0.50-2 here....... http://msp.ucsd.edu/software.html
David.

Scandinavian! It's only in pd this has occurred but I will try and check keyboard layout! I'm going strong with the .50-2

@Help i had the same problem, thank you @whale-av for providing me with that info i will download it right away!