Downloaded it, it failed. Tried deleting the existing directory completely, then installing, same behavior.
Initial error is "There was an error reading the database. Attempt to download replacement?" Selecting "no" just ends the program, selecting "yes" gets "Enhancement Database file isn't how it should be (Too many bytes in what should have been a 7 bit encoded Int32.)"
Tried again on a different machine, no problems observed. I don't immediately know what the significant difference is; both hosts are Windows 7 Home Premium, 64-bit. In both cases, the program was installed as admin (since the installer doesn't work otherwise), and run as a regular user.
... Nevermind. Turns out that the default install leaves the program unable to run except as an administrator! I haven't tracked this down more specifically yet, but so far as I can tell, once installed, Mids still needs to run as admin to have sufficient access to files. (If you try to install it without admin privs to begin with, it fails dismally because it can't write to Program Files. I don't know enough about Windows to suggest what I should do instead.)
Edited again: More messing about, and if instead of installing in the default location, I install in my home directory, it seems to work fine.
awesome, new stuff is looking good, but will do some numbers checking to compare mids numbers with in-game numbers
Hehe. Arcanatime added. 
I'd love to see the return of Exemplaring. I, personally, don't care about the numbers. I use it A) To see what powers are available to me at what Ex'd level, and B) To help me when I transcribe my build from Mids' to Excel for level-up purposes when at a Trainer.
I'd also love to have the option to set the Default Enhancement Type as Training, DO, SO, or (Common) IO. I always use Common IOs when planning my builds.
Maybe one day... at least we can update from within Mids' itself again. NICE!! 
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Biggest Troll on the forums? I'll give you a hint:
Tried to download the new version of Mid's and I can't get it to work. It says "There was a problem opening the file for writing and then starts to list like 20 some files. I am running as Administrator in XP. I uninstalled the previous one and still the the same reply.
If I try to run the program I get: Huh...
Enhancement database file isn't how it should be (Exception of type 'system.outofmemoryexception' was thrown.) No enhancements have been loaded.
The petition link to Save CoH:
http://www.change.org/petitions/ncso...city-of-heroes
You're probably better off asking for help on the Titan Network forums, especially since this thread will probably be locked for necromancy.
"You don't lose levels. You don't have equipment to wear out, repair, or lose, or that anyone can steal from you. About the only thing lighter than debt they could do is have an NPC walk by, point and laugh before you can go to the hospital or base." -Memphis_Bill
We will honor the past, and fight to the last, it will be a good way to die...
Everything DarkGob said. 
Here's the link...Let us know if there is any problems!!!
Cheers
http://www.cohplanner.com/download.php
BALANCE IS A NERF
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Han Solo: [laughs] Hokey religions and ancient weapons are no match for a good BLASTER at your side, kid.