Layout Page Line Weights

[ashealy]

I've recently upgraded to a new machine and have reopened a layout file to update some elevations. After doing so, my line weights have changed from their defaults 6-Normal and 3-Pattern to 1 for everything. Is there a way to make a universal change that will revert the line weights to their default? I've tried to reset the defaults, then reopen a layout, update it, and now the values all changed to 6 for one of the elevations. Any help would be appreciated since I've spent lots of time getting 5 pages of cabinet elevations looking perfect. Running X1.