Wizard won't finish when tinymce is involved - more.

I downloaded asset-5.x-2.0-beta1.tar.gz and was able to install and seemingly integrate with tinymce, but when I click "Finish" at the end of the wizard, it doesn't respond. If I turn off rich text and don't use tinymce, it goes ahead and gives me my link. The upload process works fine with tinymce in the picture, and I can turn it off and then go and get the link for the uploaded file.

When I click "Finish" in the wizard I get the following error:
uncaught exception: [Exception... "Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIDOMNSHTMLTextAreaElement.selectionStart]" nsresult: "0x80004005 (NS_ERROR_FAILURE)" location: "JS frame :: http://mysite.com/sites/all/modules/asset/js/asset_wizard.js :: anonymous :: line 225" data: no]

I chose this version because I know we will want the upgrade path, and for now we don't need the fancier features that are not yet working. We are only uploading and sharing some pdf files.

I've gone over all the installation steps carefully, paying especially close attention to the tinymce instructions. I copied the folder from the asset directory to the correct one in the tinymce directory. I added the lines to plugin_reg.php, enabled the button in tinymce settings, and added the input type. Tinymce works fine otherwise.

I had some confusion at the start. I first installed the earlier version of Asset, but didn't try to run it. I only enabled the module without any configuration or testing. I realized I was going to want the new one, so I disabled and deleted the old one but didn't think to "uninstall". I then uploaded the new module, enabled and configured it and nothing much worked. I was getting things like this: Unknown column 'pid' in 'field list' query: SELECT aid, pid, title FROM asset WHERE type="directory"...

So I disabled the new module, and then noticed it was waiting in the uninstall list, so I ran that. I got a warning about a table not being available for deletion, but I went forward.

I turned the module back on and received one user warning: Table 'asset_role' already exists query: CREATE TABLE asset_role ( aid int(10) unsigned NOT NULL, rid int(10) unsigned NOT NULL, status tinyint unsigned NOT NULL default '0', PRIMARY KEY (aid,rid) ) TYPE=MyISAM /*!40100 DEFAULT CHARACTER SET utf8 */; in /home/content/.../html/includes/database.mysql.inc on line 172.

Again, I went forward and, in spite of all that, it works except for this one last bit, although I should mention my installation looks a bit different from the documentation images. My wizard shows icons for the files and folders, but no other icons. The menu at the top does not look like a menu bar, instead it's just a text list. I seem to be missing some css or something like that. I don't care how it looks if it works, but am mentioning it because it's different.

Any ideas? If I have to remove the module and try again, should I remove some things by hand from my MySQL tables after I do? If so, exactly what should I remove? Should I try a different version? (I realize I'm probably dealing with exactly the stuff I was trying to avoid by opting for the newer module but at least I don't have any uploads to worry about yet.)