[RM2K9] RANDOMLY WON'T LET ME USE PICTURE LAYERS ABOVE 50 ANYMORE; WORKING FINE YESTERDAY

Hi, all. Been a while since I've had to post in here for help, but I've run into a most perplexing and exceedingly random problem. I've been using Cherry's RPG Maker 2009 with RPG Advocate's RPG Maker 2003 1.08 for many years now working on the same project, and everything has been gravy except that just now, as of about an hour ago, I have been unable to utilize the picture layers above 50 in Show, Move, or Erase Picture commands.

Even just as recently as yesterday, I was making use of picture layers above 50, and now today, it won't let me.

If I try to input a number above 50, it automatically reverts to 50 as soon as I press the second number, just like it would if I were using RPG Maker 2003 *without* RPG Maker 2009. My project already has scads and scads of lines that make use of picture layers above 50, and if I try to edit any of them, the layer number automatically reverts to 50 as soon as the edit window appears.

I've tried completely exiting out of the maker and booting it back up several times, and even restarting my computer altogether, and I haven't the foggiest idea what else I could possibly try. This is an extremely important problem that's kind of bringing my project to something of a halt (although I guess I could still do art stuff...), and so I really hope someone on here knows how to fix this, 'cause I sure don't. ::sadface::

I am 100% positive that I am loading 2k9 v0.15 Alpha. I have to click the "2k3" button on the pre-interface and everything.

I did try starting a new project, and it wouldn't let that one utilize pictures over 50 either. I probably should have mentioned that before.

Just now, I tried extracting a fresh copy of 2k9, and that one is no different. It's behaving in exactly the same way. This is actually really scary, because I've spent *five years* on this project...

The *only* thing that's changed, the only thing that I've done differently than normal in the last couple of days, is that I got the bright idea to pin 2k9 to my Taskbar. That is the only thing out of the usual in this relevant time frame. Removing it doesn't seem to help, though...

EDIT: Oh, also, it will still let me go above the maximums on everything else. I can still utilize variables and switches above 5000, and I can still set variables to values that reach ungodly heights. It's *just* the picture layers...