Take note the "I hope"...

I hope i will include it in one of the releases before new Year. This is not a primitive feature actually because it is change stored data format. And such things require very thorough testing to not brake the existing data for 10000 users i have now.

About this feature - meantime no.

No, it is seems I not very carefully had read you request. This is also know and even more annoying problem (yet not for me : ) as i am never close the Chrome nor restart the PC - they always crash : )). 

This problem have different origin that the one with restoring after crash, but the same solution actually must be implemented to satisfy both of this cases (as the actually a Chrome restart with reopening last known set of tabs is using same Restore feature, which actually does not give possibility to distinguish between really new or restored windows for extensions).

Yet this one maybe I will fix sooner... at least i plan this to do in this year  : ) exist simple solution, yet without restoring exactly the hierarchy of reopened tabs (as it was in last session).

Maybe it is simple worth to put all restored windows in a group, then to delete all crashed from last session one will be required only collapse and delete this group...

Aha, i reread you request and seems you want a way to automatically remove the crashed windows from last session, understand. I actually have plan to fix this in anothere way, so all new windows restored by Chrome restore feature will be reassociated with old ones from last session. But this you idea is also interesting as quick fix...

This is known problem and of course it is annoy me also. But the fix is not easy one, and currently the cloud backup is more important issue and needed more, so this will be in idle state for some time.

The only advise i can give you is that - simple don't use chrome restore. On Chrome restart open TO, ensure that all you windows is there and readily available to be restored if you want so, then say cancel to Chrome restore and restore everything from TO. This really works for me, but of course require some new habits and not so convenient, but this is also really reduce number of open windows. As most of the time after crash need restore max 2-3 tabs anyway, not all 300-400 that was open before the crash...

Yet of course this must be fixed and it will be fixed. As it is simple impossible to repeat this every day in emails : )) This is the problem the most new users report to me directly.

Some of the next version will be able to load user css styles so if anybody will do this, (or you) the buttons will be possible to place where you want them. They completely styled by css only

In theory there no need to restore everything if you not  plan to read the tabs content immediately  So my advise - try to restore only the tabs you plan to view immediately. 

Of course i understand that it is easy to say then form such a habit...

This proposed feature conflict with some other cases. So unlikely it will be implemented. But i will think about this. Especially if it will gather some votes of other users.

UPDATE

After some thinking and reading i start to understand that maybe this case  will represent some category of users who use TO in somewhat special way, not as tab addicts who open hundreds NEW tabs every day (as i am),  but somebody who have own set of older tabs for many months and really like to restore it every day as as it was day before.

Well.. not sure why need to restore it every day now, this was needed before, as the only other option was to bury all the tabs in some sort of hidden list of some session manager, but in TO even saved tabs is present in current context, but... worth to think about this some more i think.

UPDATE

I decide to do this, seems it is really needed. And more, remembering the state of tab nodes (open/closed on their window shutdown)  was needed for interoperability with Chrome restore feature. So i understand that I need this anyway.
This will be done as Alt-DblClick. With a possibility to make this as default behavior (and current one as ALTernative) in options

In theory there no need to restore everything if you not  plan to read the tabs content immediately  So my advise - try to restore only the tabs you plan to view immediately. 

Of course i understand that it is easy to say then form such a habit...

This proposed feature conflict with some other cases. So unlikely it will be implemented. But i will think about this. Especially if it will gather some votes of other users.

UPDATE

After some thinking and reading i start to understand that maybe this case  will represent some category of users who use TO in somewhat special way, not as tab addicts who open hundreds NEW tabs every day (as i am),  but somebody who have own set of older tabs for many months and really like to restore it every day as as it was day before.

Well.. not sure why need to restore it every day now, this was needed before, as the only other option was to bury all the tabs in some sort of hidden list of some session manager, but in TO even saved tabs is present in current context, but... worth to think about this some more i think.

UPDATE

I decide to do this, seems it is really needed. And more, remembering the state of tab nodes (open/closed on their window shutdown)  was needed for interoperability with Chrome restore feature. So i understand that I need this anyway.
This will be done as Alt-DblClick. With a possibility to make this default behavior (and current one as ALTernative) in options