Microsoft recently announced the public preview of the new solution explorer which will eventually be the default experience going forward.
Earlier we could access it by visiting the – https://make.preview.powerapps.com/
In the new experience, we can Enable / Disable the new Solution Explorer by toggling the Solution preview on
The is how the existing solution experience looks like – here we have opened the Default solution.
With the new experience, the solution selected opens up and takes the whole page, with the new left navigation added.
Also, it adds a new Tree style of navigation for Objects.
+New button experience has been updated.
Left is the old experience listing each component and new experience in the right with the options grouped.
The overview section gives the details of the solution like display name, name, package type, etc. with the option to edit the details.
- The option to run the Solution Checker.
- Manage Search Index.
- Recent activities performed.
The history page gives the details of the operations performed on the solution.
If we still need we can switch to classic
Performance improvements through parallel loading (Tree View) and caching (Solution objects, authentication while switching to classic, etc.
Get all the details here
https://powerapps.microsoft.com/en-us/blog/managing-solutions-has-a-new-look-public-preview/
Hope it helps..
Nishant Rana's Weblog 
Reblogged this on Arun Potti's MS CRM blog.
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