EDIT: Please go straight to Beta v18.104.22.168, this one is broken!
The new beta version makes DropboxPortableAHK usable again with the latest Dropbox version (9.4.49)
It is not possible to run multiple Dropbox instances simultaneously, yet. This includes the regular Dropbox client. To sync multiple instances, you can simply start them one after another and shut them down again when they finished syncing.
This can easily be automated with DropboxPortableAHK’s SyncAndGo feature.
If DropboxPortableAHK makes your life easier, please consider a donation or leave a comment. Any feedback is greatly appreciated
Please check out the user group for more information, the download link, and to report any issues: https://groups.google.com/forum/#!forum/dropboxportableahk