3 Things I can think of.
1>Studio one makes periodic backups of your songs while you're working on them. So if it's only the song that crashes and not the entire program, it might be worth finding those backups and restore/revert to a previous version of the song on the possibility that it's just your song that got corrupted. (I've never actually had to do that so I don't know the specifics on how it's done. I just know it can be done)
2>If you want to temporarily disable a plugin, you can go to the plugin directory and temporarily change the filename. Typically what I do in this instance is just change the extension. For example, change plugin.dll to plugin.dl1. When studio one opens, it won't find the plugin so it won't load it. (I have no idea how this will affect loading your song.)
3>If you want to temporarily disable all your plugins, you can temporarily change the folder name for where your plugins are located. For example C:\VST to C:\VST-Nope-not here. When Studio one opens, it won't find any of your plugins and won't load them. Again, no idea how that will affect loading your song.
If you haven't already, you might want to test the VST's in question on other songs to determine if the VST has gone bad or if it's just the song that got corrupted.