I also have problems with IK plugins... in short, they don't work.
I have been in an endless Authorization Manager nightmare loop with IK. All the software registered fine, until it came to time to actually use it. Then I get ' Authorization Manager out of date' so I d/l the new, which of course is identical the to AM that I already have. ... and I go to use and ... 'Authorization Manager out of date' .. and here we go again. IK put me through the hoops .. remove AM, d/l again, open again .. and ... 'Authorization Manager is out of date ' ....
After a dozen remove and u/l again, I finally asked IK if it were not easier and much less agro to delete all of the IK stuff .. they replied .. upload the Authorization Manager ... uh huh .. been there .. done that ..
Frustrating thing is .. all their software registered, have the id codes, but it refuses to let me use the software .. with every attempt ... yep ... 'Authorization Manager is out of date ...... "