Sheet selection change from Add-In

I have this macro which runs from an Add-In.
When there is a selection change in column A, it calls up a macro.
At the moment, it runs on all files and all sheets.

The files I want to run it on, have the following 2 conditions. Both conditions must be met.
- The macro only runs on Sheet1 (this is VBA name Sheet1 , not tab name)
- There is another worksheet called "Aid Sheet" (this is a tab name and not a VBA name).

ThisWorkbook

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Module1

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ClassChange class module

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