Some macros report errors：

Exception has been thrown by the target of an invocation.
Ambiguous match found.
[System.Reflection.AmbiguousMatchException]
[System.Reflection.TargetInvocationException]

The macros such as:
1. Paste Oldest History Item and Remove
2. Paste All History Items with Line Breaks

I'm also getting this error and my most-used macros are not working. They were working in previous versions (I think Beta 2, but cannot confirm) but are not working in Beta 3. Thanks for prioritizing this issue.

If a fix will take a while, how do I downgrade to the last stable version?

I continue to get the same error with beta 4.

Run failed. exception has been thrown by the target of an invocation. ambiguous match found. [system.reflection.ambiguousmatchexception] [system.reflection.targetinvocationexception]

Macro attached. Let me know if it works for you.