Studio 2017 crashes every time before it opens fully

Hello,

 

Yesterday Studio 2017 was working fine, but today when I tried to open some new packages for translation, it went through the motions of importing them, and I could even see that they had been analysed, but they did not appear in the projects list or in the editor view. I tried to restart my computer and restart Studio, but now it won't even open. It shows the usual messages it shows when opening it for the fist time, but at the last minute it shows two identical error messages:

"Cannot validate SDL plug-in.." (see iimage below).

I am now unable to work in Studio but have lots of work waiting. Please could someone offer some help? Thank you? error message.docx

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