ALTPLL Megawizard crashes

Well, sort of...

Sadly this is still broken under Quartus 18.1 under Linux (I had this problem under Ubuntu so, because the official line is that Ubuntu is not supported, I installed a system with Centos 7 for the sole purpose of (hopefully) being able to run Quartus without so much flakiness but alas it still [sometimes] behaves badly under CentOS as well). However: I have found that sometimes when the ALTPLL Megawizard goes into its unresponsive-and-burning-99%-CPU routine if I leave it alone for ten minutes or so and go make a cup of coffee it sorts itself out and all subsequent pages after the first work. However other times it never comes around. I've also had a similar problem with the on-chip-memory wizard as well. Ultimately I really wish they'd admit that the whole Megawizard thing is a lost cause and just document clearly and in a centralized location the TCL commands to create all these IP variants and hard block instances from the command line with no GUI (because it seems to be the GUI that's going sideways, not the actual underlying code that does the work to generate the instance information by filling out its template).