Problems with character replacements

I recently upgraded the vBSEO on our test server to 3.6.0 (vBulletin 3.8.2) and I can't get the character replacements to work properly. The site's charset is ISO-8859-2, and I need to get the č character to translate to c in URLs. Instead, it translates to e (è in ISO-8859-1 has the same code as č in ISO-8859-2). I set the vBSEO control panel charset to ISO-8859-2, but when I then try to create a rule for

Code:

č=>'c'

, when I click Save Settings, it replaces it with

Code:

// �=>'c'

You need to use character replacements as following

Code:

'č'=>'c'

Thank you, it's working now.
It didn't occur to me, because the control panel page has examples without the apostrophes.