I have honestly no idea. They haven't released an update for Skyrim since the 1.9 patch. If it was working when you installed it and has been for several weeks then I can only assume it's something else you've done in the mean time. I highly recommend you download TES5Edit and run it. It will tell you if you have any missing master files (the most common cause for CTD issues).

I had using this mod in my game for several weeks without problem. Suddenly the Skyrim load page started crashing. We couldn't even get to the menu to select with saved file to load. After hours of working the process of elimination, I discovered this Treebalance - Smithing mod was the cause of the crashing. Removing it cased Skyrim to work again.

I'm curious, do you know if Bethseda might have made a change, and pushed it out to the public, which made your mod unloadable?

Oh god, this is hidious.

Updated version of this mod should automatically update when the person waits for the Skyrim mod files they subscribed to, to go through the process. Meaning they'll have to keep the menu open and watch the bottom right to go through all the files. Wont hurt to double check the mod though and make sure it updated through steam when you click that upload button in the files.

I updated the mod to fix that. Or at least I thought I did. Have you downloaded the updated version?

I have the same problem with increased leveling, just so you know it isn't an isolated event

@Captain Chloroform No Problem ^^ Glad to help ya out.

Thanks for that. I'd been experimenting with those values but hadn't found the right combination.

@Captain Chloroform Hey, I found the issue with your smithing problem that jumps the levels up. The values in the workshop are messed up so you go into the Smithing in this --> Character/Actor Values.../ Smithing and then this to the values

Skill Use Mult: 1
Skill Use Offset: 0
Skill Improve Mult: 1
Skill Improve Offset: 20

@Captain Chloroform
i used the console to learn al the lost skills, thats what i always do when i download a tree perk mod :3

Huh. That didn't happen to me O_o I'll take a look but it might be best to use this mod with a new character.

i didn't lose steel smithing XD
but did lose all the others

If a character already has perks then they shouldn't lose them. However they won't automatically get the new perks I added. You'll need to get those perks by levelling up and putting a point into them.

how will this affect a current character's perks?

advanced armors is placed at the right spot, w00t!!!
(wait... just 3 subscribers (including me)
this sould have been the original smithing perk, basic and iron smithing why did the game disigners never put that in the smithing perk?