Upgrade for Free 4.7 to Pro 4.8x -> missmatch

Hello.

I used in the past the free Version of 4.7 Version.

Then we bought the Pro version with all Plugins, because we need some additional stuff.

After installing the new version 4.8.8 Pro , total missmatch in our program. GUI doesnt work anymore. I think you changed several css files.

Then you sent me the download link of Version 4.7 Pro. We installed it right now.

Result: Not that many GUI problems. But enough. And Date Picker flickers. Question: Why dow we have that many GUI problems, when we change from Free 4.7 version to Pro 4.8 version ?

And .. how should we change very easy from the 4.7 Free version to the current existing version 4.8.8 Pro, without to change several days our program ?

Do you have an overview of the changes ? Or any other help for us ? Should we change first from 4.7 free to 4.XX Pro. Then from 4.XX Pro to 4.ZZ Pro .. and so on..

Or.. what we should we do ?

Any help for me ?

Regards Stefan