Just a thought, since I don't have any experience with the product you're dealing with.
"The following is for entertainment purposes only. Do no attempt at home."
(It might work, and I'd try it if I were in a similar situation. But I'm not very bright.)
Get someone to help you, to steady the bike, keep an eye on it in case it seems unstable, or call the paramedics.
When the bike is on the center stand I can usually lift the front wheel a couple inches. I'd slide a 2x6 (about 6' long) under the front wheel, approaching it from the front of the bike. This should tip the weight of the bike back onto the rear tire.
Now I'd slide something under the front end of the 2x6. This will raise the front wheel a little more (leverage), putting more weight on the rear tire.
This should put enough of the bike's weight on the rear wheel that when I sit on the bike I might be able to drive it off the center stand.
I have long legs so, when the bike drives off the stand and the front tire is on the 2x6, I can steady the bike and roll it backwards off the 2x6. Others might not be as fortunate and might try something silly like tipping it over onto the side stand -- which wouldn't work!
As I said above, this is what I'd do. I don't recommend that you try it.
"Objects in mirror may be closer than they appear. For professional use only." Blah, blah.
Enjoy!