I doubt i'm the ONLY one, more likely the only one who has commented on it. Plenty of people use the devel repo and not the forum, or don't know the thread, or just uninstall devel apps when they have a problem and wait for it to hit extras.
I'll do your uninstall/reinstall method, but as this is currently in development and testing, any problem should be examined. I may be the only one with the problem now, but when it hits more phones after promotion it may become quite widespread (i've had a few problematic apps from extras where apps weren't tested thoroughly enough)

Edit: apt-get purge FastSMS FastSMSEvo returned
reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package FastSMS