# Extension manager problems

**URL:** <https://discourse.slicer.org/t/extension-manager-problems/11946>\
**Category:** Support\
**Created:** [June 9, 2020, 9:23am UTC](https://discourse.slicer.org/t/extension-manager-problems/11946 "2020-06-09T09:23:18Z")\
**Posts on this page:** 1\
**Showing post:** 4

<div class="post-metadata">

**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [June 9, 2020, 4:29pm UTC](https://discourse.slicer.org/t/extension-manager-problems/11946/4 "2020-06-09T16:29:32Z")

</div>

It is also a timing issue - between about 1am-10am EST, extensions are not available yet for the latest Slicer Preview Release (see some more information and solution [here](https://discourse.slicer.org/t/is-it-possible-to-do-a-segmentation-of-the-lumbar-spine-from-ct-data-and-use-the-3d-model-igs-for-further-finite-element-analysis-in-abaqus-or-febio/10444/17)).

> [@opetne](#):
>
> Plus any time if I install the new version it says that there is no existing DICOM database and I have to reload all the DICOM series what are in the Slicer dicom database folder that the previous version created on my computer

You need to do this only once. All recent (not more than a few months old) Slicer Preview Releases can work from the same DICOM database. If you open the same database with an older Slicer version (e.g., 4.10) then it will downgrade the database. I would suggest not to mix Slicer-4.10 and 4.11 and just use recent Slicer-4.11 releases now.

---

_[View the full topic](https://discourse.slicer.org/t/extension-manager-problems/11946)._