Search, Slowness, and Card Preview issues

[jerryrs 0]

I have been using Evernote for Mac for many years but lately it has become almost unusable for me.  I am on OS 10.10.5 Yosemite so the latest version I am able to update to is 6.12.3 so I'm not sure if that is part of the problem.

The issues I am experiencing are:

Search issues - When I search I see the spin icon then nothing happens. If I click on the relevance dropdown to the left it will usually allow me to see my search results, but in the past the search results were fast and instant.

Slowness - Overall the tool is lethargic. Seemingly any function I do results in sluggish responses.

Card Preview - If I click on a note thumbnail the preview to the right does not display the message. The only way to display the message is if I double click on the note thumbnail which opens the note in a separate window.

Any one experience these or similar issues and know of any potential fixes?