I restarted my computer today for the first time in svereal weeks. And suddenly when i re-booted it, JChem for excel dissapered from Excel, I can not convert smile to structure or use any other functions. I re-installed the program also but nothing happend. I can also go to formulas and then insert "Jchem functions" but i got error messages when I try to calculate somethjing on a smile string "#VALUE". Someone that knows what´s the problem?