After some investigations it becomes clear, that the problem is in the not corresponding versions of the machine (x64), Win7 (x64) and Excel 15 (x32). BTW. if you need to get to know, what is installed on your machine - here are all the places listed, where you get needful information about your hardware, OS and Excel.
SolutionAs a solution for striking SEOTools move into registry (regedit), find following places:
14.0 is the version number of your Excel - mine is 15.0. Delete the both folders (don't forget to backup), then restart the machine. Before you start Excel again, delete the folder with seotools.xll, then start Excel and point it to seotools.xll again.
My machine didn't have the second registry folder, HKEY_LOCAL_MACHINE\Software\Microsoft\Office\14.0\Excel, so if you haven't it too, don't wonder. After these manipulations my SEOTools for Excel works like expected.
UpdateAn other, more delicate solution, which is specially for somebody, who've done some Excel customizations and doesn't want to loose them:
- go to the registry,
- find this folder: HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Excel\Resiliency\DisabledItems.
- Inside the folder should be placed a single one binary key. Delete it.
After deletion the SEOTools ribbon should become immediately visible.
Disclaimer: i haven't tried this solution, but it seems to be correct. The logic behind it is: sometimes the DisabledItems is set by Excel while lock-up. So it worth just to delete the wrongly set DisabledItems key.