ML, I try deleted several layer for resize the file because the PaintShop burn, the PC not have enought memory. Tomorow, I post the file, I hope, in 2048x2048.You won't be able to just make it bigger, everything on it will get very pixelated. If you make it bigger you'll need to redo it bigger. Minimum size 2048 x 2048 depending on your PC spec you could go higher.
You won't have made this using my template as mine are 4096 x 4096, you made this from someone who was using my template for his own gains, not mine.