prproj file problems

Hello,

recently i´ve updated for a new version of premiere pro and tried editing. Everything was good and smooth until i tried to use some transitions that i´ve downloaded and used before. I can´t use them because icons of prproj are not showing. I can only see some white paper icon and not premiere pro icon. Whatsmore when i try to open it, it gives me menu where i can chose the program that i want to open it with. So i found the location where i installed premiere pro and selected it...but it didn´t work. Icons didn´t change and it didn´t open. It doesn´t even say anything that it has some problem or so.

So i was thinking, maybe transitions are outdated but then i had similar problem with opening my project where were only videos without luts, transitions etc...

Icon was missing again but atlest it was openable.

Is there any solution to this issue please ? 

Thank you